Summon Aberration

Level & School
4th-level conjuration
Casting Time
Action
Range
90 feet
Components
V, S, M (a pickled tentacle and an eyeball in a platinum-inlaid vial worth 400+ GP)
Duration
Concentration, up to 1 hour
Classes
Warlock, Wizard

You call forth an aberrant spirit. It manifests in an unoccupied space that you can see within range and uses the Aberrant Spirit stat block. When you cast the spell, choose Beholderkin, Mind Flayer, or Slaad. The creature resembles an Aberration of that kind, which 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, it 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.

Level & School
4th-level conjuration
Casting Time
Action
Range
90 feet
Components
V, S, M (a pickled tentacle and an eyeball in a platinum inlaid vial worth at least 400 gp)
Duration
Concentration, up to 1 hour
Classes
Warlock, Wizard

You call forth an aberrant spirit. It manifests in an unoccupied space that you can see within range. This corporeal form uses the Aberrant Spirit stat block. When you cast the spell, choose Beholderkin, Slaad, or Star Spawn. The creature resembles an aberration of that kind, which determines certain traits 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 companions. 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 take the Dodge action and uses its move to avoid danger.

Using a Higher-Level Spell Slot. When you cast this spell using a spell slot of 5th level or higher, use the higher level wherever the spell's level appears on the stat block.

Summon Aberration 5.5e 2024 vs. 5e 2014 edition differences

The 2024 version changes the creature options to Beholderkin, Mind Flayer, or Slaad; clarifies the creature's relation to "your allies"; states "disappears when it drops to 0 Hit Points"; and simplifies the higher-level casting effect to "use the spell slot's level" in the stat block.