Call Lightning is a visually impressive spell that can dish out punishment and be maintained and used round after round. The strikes invoked by the caster deal damage to small areas, potentially hitting more than one target.
The rules for Call Lightning can be found in the Players Handbook on page 220.
Call Lightning 5e
Casting Time: 1 Action
Range: 120 Feet
Components: V, S,
Duration: 10 Minutes (Concentration)
A storm cloud appears in the shape of a cylinder that is 10 feet tall with a 60-foot radius, centered on a point you can see within range directly above you. The spell fails if you can’t see a point in the air where the storm cloud could appear (for example, if you are in a room that can’t accommodate the cloud).
When you cast the spell, choose a point you can see under the cloud. A bolt of lightning flashes down from the cloud to that point. Each creature within 5 feet of that point must make a Dexterity saving throw. A creature takes 3d10 lightning damage on a failed save or half as much damage on a successful one. On each of your turns, until the spell ends, you can use your action to call down lightning in this way again, targeting the same point or a different one.
If you are outdoors in stormy conditions when you cast this spell, the spell gives you control over the existing storm instead of creating a new one. Under such conditions, the spell’s damage increases by 1d10.
At Higher Levels: When you cast this spell using a spell slot of 4th or higher level, the damage increases by 1d10 for each slot level above 3rd.
The rules for Call Lightning outline the massive area the spell encompasses as well as the extended duration in which it takes place. A 120-foot diameter cloud that is 10 feet tall allows the caster to target anyone inside and deals damage to any creature within 5 feet of that target. Calling lightning bolts to strike enemies does take an action, and the spell is concentration, so once it is cast, the caster should plan on being at least semi-committed.
Can you use Call Lightning Indoors?
In short, the answer is yes. You can use the spell Call Lightning indoors. The room does need to be large enough to accommodate the cloud. This includes all elements of the cloud and specifications for casting. The room would need to be 110 feet tall and 120 feet wide, and the caster would need to be in the center.
These specifications make it difficult but not impossible to use the spell inside. For example, a large underground cavern could potentially provide enough space to allow the spell to succeed.
Keep in mind that if there is not sufficient room for the spell, it automatically fails. The cloud also cannot travel around corners or through other openings.
Does Call Lightning Move with You?
The spell descriptions in 5E are very specific for a reason. This means that if the spell doesn’t say it can move (as this one), then it doesn’t. Call Lightning is best cast in a location that the caster is intending to stay at least somewhat close to or placed strategically.
The 120-foot diameter does give the caster quite a bit of range as far as creatures they can target. The spell also does not specify that the spell ends if the caster leaves the area described after casting. The caster still needs to be able to see the point targeted but are not required to stand in the area of the cloud.
Is Call Lightning a Concentration Spell?
Yes, Call Lightning is a concentration spell. This means that the caster if concentrating, can keep the spell active for a full 10 minutes. This is a great way to hold enemies back while the party regroups. It can also be used as cover for a party that needs to escape. There is nothing preventing a seafaring party from using Call Lightning to provide cover as they sail away.
Druids can maintain concentration while in wild shape. This means a druid could cast Call Lightning and then wild shape if needed. The downside is using the action to call a bolt down, but it also provides a potential ranged attack that wild shape generally lacks.
Can Wizards Cast Call Lightning?
In typical circumstances Call Lightning is a Druid exclusive spell. The Tempest Cleric does gain access to the spell, but it is not featured on any other class spell lists. This is an enticing feature for the Druid that separates them from other casters and exemplifies their connection to nature. A Druid out in the wild is a force to be reckoned with.
Call Lightning is a spell that earns its spot on the prepared list. As a Druid exclusive, it is one of the most popular spells to take with that class. It does have its downsides, but the impact it has is devastating. The flexibility and numerous potential uses make it a great multi-purpose combat spell.