Giant Insect 5e Spell (2014 & 2024): 4th-Level Transmutation

Giant Insect 5e spell

4th-level transmutation (concentration) · 2024 version below

Casting time: 1 action
Range: 30 feet
Components: V, S
Duration: Concentration, Up to 10 minutes
School: Transmutation
Level: 4

You transform up to ten centipedes, three spiders, five wasps, or one scorpion within range into giant versions of their natural forms for the duration. A centipede becomes a giant centipede, a spider becomes a giant spider, a wasp becomes a giant wasp, and a scorpion becomes a giant scorpion.

Each creature obeys your verbal commands, and in combat, they act on your turn each round. The GM has the statistics for these creatures and resolves their actions and movement.

A creature remains in its giant size for the duration, until it drops to 0 hit points, or until you use an action to dismiss the effect on it.

The GM might allow you to choose different targets. For example, if you transform a bee, its giant version might have the same statistics as a giant wasp.

Classes that can cast Giant Insect

Class	First available	Spellcasting ability
Druid spells	7th character level	Wisdom

Giant Insect in the 2024 rules

The 2024 Player’s Handbook revised many spells, and the SRD 5.2 carries the new text. What changed from the 2014 version above:

Its school changed from Transmutation to Conjuration.
Range: 30 feet → 60 feet.

Casting time: Action
Range: 60 feet
Components: V, S
Duration: Concentration, up to 10 minutes
School: Conjuration
Level: 4
Classes: Druid
Tags: concentration

You summon a giant centipede, spider, or wasp (chosen when you cast the spell). It manifests in an unoccupied space you can see within range and uses the Giant Insect stat block. The form you choose determines certain details in its stat block. The creature disappears when it drops to 0 Hit Points or when the spell ends.

The creature is an ally to you and your allies. In combat, the creature shares your Initiative count, but it takes its turn immediately after yours. It obeys your verbal commands (no action required by you). If you don't issue any, it takes the Dodge action and uses its movement to avoid danger.

Using a Higher-Level Spell Slot. Use the spell slot's level for the spell's level in the stat block.

Giant Insect

Large Beast, Unaligned

AC 11 + the spell's level

HP 30 + 10 for each spell level above 4

Speed 40 ft., Climb 40 ft., Fly 40 ft. (Wasp only)

Ability	Score	Mod	Save
Str	17	+3	+3
Dex	13	+1	+1
Con	15	+2	+2
Int	4	−3	−3
Wis	14	+2	+2
Cha	3	−4	−4

Senses Darkvision 60 ft.; Passive Perception 12

Languages Understands the languages you know

CR None (XP 0; PB equals your Proficiency Bonus)

Traits

Spider Climb. The insect can climb difficult surfaces, including along ceilings, without needing to make an ability check.

Actions

Multiattack. The insect makes a number of attacks equal to half this spell's level (round down).

Poison Jab. Melee Attack Roll: Bonus equals your spell attack modifier, reach 10 ft. Hit: 1d6 + 3 plus the spell's level Piercing damage plus 1d4 Poison damage.

Web Bolt (Spider Only). Ranged Attack Roll: Bonus equals your spell attack modifier, range 60 ft. Hit: 1d10 + 3 plus the spell's level Bludgeoning damage, and the target's Speed is reduced to 0 until the start of the insect's next turn.

Bonus Actions

Venomous Spew (Centipede Only). Constitution Saving Throw: Your spell save DC, one creature the insect can see within 10 feet. Failure: The target has the Poisoned condition until the start of the insect's next turn.

2024 version from the SRD 5.2. Most tables settle on one edition, so check which one yours uses.

Giant Insect 5e spell

Classes that can cast Giant Insect

Giant Insect in the 2024 rules

Other 4th-level transmutation spells