Spellcasting

Casting a Spell

When a character casts any spell, the same basic rules are followed, regardless of the character’s Aethyrflame or the spell’s effects.

Each spell description begins with a block of information, including the spell’s name, level, school of magic, casting time, range, components, and duration. The rest of a spell entry describes the spell’s effect.

Casting Time

Most spells require a single action to cast, but some spells require a bonus action, a reaction, or much more time to cast.

Bonus Action

A spell cast with a bonus action is especially swift. You must use a bonus action on your turn to cast the spell, provided that you haven’t already taken a bonus action this turn. You can’t cast another spell during the same turn, except for a cantrip with a casting time of 1 action.

Reactions

Some spells can be cast as reactions. These spells take a fraction of a second to bring about and are cast in response to some event. If a spell can be cast as a reaction, the spell description tells you exactly when you can do so.

Longer Casting Times

Certain spells (including spells cast as rituals) require more time to cast: minutes or even hours. When you cast a spell with a casting time longer than a single action or reaction, you must spend your action each turn casting the spell, and you must maintain your concentration while you do so (see “Concentration” below). If your concentration is broken, the spell fails, but you don’t expend a spell slot. If you want to try casting the spell again, you must start over.

Spell Range

The target of a spell must be within the spell’s range. For a spell like magic missile, the target is a creature. For a spell like fireball, the target is the point in space where the ball of fire erupts.

Most spells have ranges expressed in feet. Some spells can target only a creature (including you) that you touch. Other spells, such as the shield spell, affect only you. These spells have a range of self.

Spells that create cones or lines of effect that originate from you also have a range of self, indicating that the origin point of the spell’s effect must be you (see “Areas of Effect” below).

Once a spell is cast, its effects aren’t limited by its range, unless the spell’s description says otherwise.

Components

A spell’s components are the physical requirements you must meet in order to cast it. Each spell’s description indicates whether it requires verbal (V), somatic (S), or material (M) components. If you can’t provide one or more of a spell’s components, you are unable to cast the spell.

Verbal (V)

Most spells require the chanting of mystic words. The words themselves aren’t the source of the spell’s power; rather, the particular combination of sounds, with specific pitch and resonance, sets the threads of magic in motion. Thus, a character who is gagged or in an area of silence, such as one created by the silence spell, can’t cast a spell with a verbal component.

Somatic (S)

Spellcasting gestures might include a forceful gesticulation or an intricate set of gestures. If a spell requires a somatic component, the caster must have free use of at least one hand to perform these gestures.

Material (M)

Casting some spells requires particular objects, specified in parentheses in the component entry. A character can use a component pouch or a spellcasting focus (found in “Equipment”) in place of the components specified for a spell. But if a cost is indicated for a component, a character must have that specific component before he or she can cast the spell.

If a spell states that a material component is consumed by the spell, the caster must provide this component for each casting of the spell.

A spellcaster must have a hand free to access a spell’s material components—or to hold a spellcasting focus—but it can be the same hand that he or she uses to perform somatic components.

Duration

A spell’s duration is the length of time the spell persists. A duration can be expressed in rounds, minutes, hours, or even years. Some spells specify that their effects last until the spells are dispelled or destroyed.

Instantaneous

Many spells are instantaneous. The spell harms, heals, creates, or alters a creature or an object in a way that can’t be dispelled, because its magic exists only for an instant.

Concentration

Some spells require you to maintain concentration in order to keep their magic active. If you lose concentration, such a spell ends.

If a spell must be maintained with concentration, that fact appears in its Duration entry, and the spell specifies how long you can concentrate on it. You can end concentration at any time (no action required).

Normal activity, such as moving and attacking, doesn’t interfere with concentration. The following factors can break concentration:

Casting another spell that requires concentration. You lose concentration on a spell if you cast another spell that requires concentration. You can’t concentrate on two spells at once.
Taking damage. Whenever you take damage while you are concentrating on a spell, you must make a Constitution saving throw to maintain your concentration. The DC equals 10 or half the damage you take, whichever number is higher. If you take damage from multiple sources, such as an arrow and a dragon’s breath, you make a separate saving throw for each source of damage.
Being incapacitated or killed. You lose concentration on a spell if you are incapacitated or if you die.

The GM might also decide that certain environmental phenomena, such as a wave crashing over you while you’re on a storm-tossed ship, require you to succeed on a DC 10 Constitution saving throw to maintain concentration on a spell.

Targets

A typical spell requires you to pick one or more targets to be affected by the spell’s magic. A spell’s description tells you whether the spell targets creatures, objects, or a point of origin for an area of effect (described below).

Unless a spell has a perceptible effect, a creature might not know it was targeted by a spell at all. An effect like crackling lightning is obvious, but a more subtle effect, such as an attempt to read a creature’s thoughts, typically goes unnoticed, unless a spell says otherwise.

A Clear Path to the Target

To target something, you must have a clear path to it, so it can’t be behind total cover.

If you place an area of effect at a point that you can’t see and an obstruction, such as a wall, is between you and that point, the point of origin comes into being on the near side of that obstruction.

Targeting Yourself

If a spell targets a creature of your choice, you can choose yourself, unless the creature must be hostile or specifically a creature other than you. If you are in the area of effect of a spell you cast, you can target yourself.

Areas of Effect

Spells such as burning hands and cone of cold cover an area, allowing them to affect multiple creatures at once.

A spell’s description specifies its area of effect, which typically has one of five different shapes: cone, cube, cylinder, line, or sphere. Every area of effect has a point of origin, a location from which the spell’s energy erupts. The rules for each shape specify how you position its point of origin. Typically, a point of origin is a point in space, but some spells have an area whose origin is a creature or an object.

A spell’s effect expands in straight lines from the point of origin. If no unblocked straight line extends from the point of origin to a location within the area of effect, that location isn’t included in the spell’s area. To block one of these imaginary lines, an obstruction must provide total cover.

Cone

A cone extends in a direction you choose from its point of origin. A cone’s width at a given point along its length is equal to that point’s distance from the point of origin. A cone’s area of effect specifies its maximum length.

A cone’s point of origin is not included in the cone’s area of effect, unless you decide otherwise.

Cube

You select a cube’s point of origin, which lies anywhere on a face of the cubic effect. The cube’s size is expressed as the length of each side.

A cube’s point of origin is not included in the cube’s area of effect, unless you decide otherwise.

Cylinder

A cylinder’s point of origin is the center of a circle of a particular radius, as given in the spell description. The circle must either be on the ground or at the height of the spell effect. The energy in a cylinder expands in straight lines from the point of origin to the perimeter of the circle, forming the base of the cylinder. The spell’s effect then shoots up from the base or down from the top, to a distance equal to the height of the cylinder.

A cylinder’s point of origin is included in the cylinder’s area of effect.

Line

A line extends from its point of origin in a straight path up to its length and covers an area defined by its width.

A line’s point of origin is not included in the line’s area of effect, unless you decide otherwise.

Sphere

You select a sphere’s point of origin, and the sphere extends outward from that point. The sphere’s size is expressed as a radius in feet that extends from the point.

A sphere’s point of origin is included in the sphere’s area of effect.

Spell Saving Throws

Many spells specify that a target can make a saving throw to avoid some or all of a spell’s effects. The spell specifies the ability that the target uses for the save and what happens on a success or failure.

The DC to resist one of your spells equals 8 + your spellcasting ability modifier + your proficiency bonus + any special modifiers.

Spell Attack Rolls

Some spells require the caster to make an attack roll to determine whether the spell effect hits the intended target. Your attack bonus with a spell attack equals your spellcasting ability modifier + your proficiency bonus.

Most spells that require attack rolls involve ranged attacks. Remember that you have disadvantage on a ranged attack roll if you are within 5 feet of a hostile creature that can see you and that isn’t incapacitated.

Combining Magical Effects

The effects of different spells add together while the durations of those spells overlap. The effects of the same spell cast multiple times don’t combine, however. Instead, the most potent effect—such as the highest bonus—from those castings applies while their durations overlap.

For example, if two spellcasters cast bless on the same target, that character gains the spell’s benefit only once; he or she doesn’t get to roll two bonus dice.

Spellcasting types

An Aethyrsparked character’s Aethyrflame Source decides how they come to know their spells:

Spellcasting Type	Aethyrflame Sources	Description
studied-spellcasting	Knowledge, Dedication	If you possess the Spellcasting Feature, the spells you have access to are prepared during each long rest. When you complete a long rest, you can select a number of spells within your Aethyr Domain (Nature, Divine, or Arcane) depending on your Aethyr Technique: - Spellcasters can prepare a number of spells within their Aethyr Domain (Nature, Divine, or Arcane) equal to their Aethyrflame Intensity (character level) plus their spellcasting ability modifier (Charisma, Intelligence, or Wisdom). - Spellcasters also know a number of cantrips equal to their proficiency bonus. - Spellfighters can prepare half as many, rounded up (sum of half of their character level and half of their spellcasting ability modifier, rounded up). - Spellfighters also know a number of cantrips equal to half their proficiency bonus, rounded up. You may cast any ritual spell within your Aethyr Domain as a ritual without having the spell prepared. - You can automatically identify when a spell you can prepare is being cast unless its casting has been altered by a Metamagic Feature.
intuitive-spellcasting	Possession, Suffusion	If you possess the Spellcasting Feature, the spells you have access to are innate to your Aethyrflame and are selected when you increase in level as a Spellfighter or Spellcaster. - Spellcasters innately know a number of spells within their Aethyr Domain (Nature, Divine, or Arcane) equal to their Aethyrflame Intensity (character level) plus their spellcasting ability modifier (Charisma, Intelligence, or Wisdom). - Spellcasters also know a number of cantrips equal to their proficiency bonus. - Spellfighters innately know half as many spells, rounded up (sum of half of their character level and half of their spellcasting ability modifier, both rounded up). - Spellfighters also know a number of cantrips equal to half their proficiency bonus, rounded up. - You also innately know a number of ritual spells within your Aethyr Domain equal to your proficiency bonus.