Aid

Level & School
2nd-level abjuration
Casting Time
Action
Range
30 feet
Components
V, S, M (a strip of white cloth)
Duration
8 hours
Classes
Bard, Cleric, Druid, Paladin, Ranger

Choose up to three creatures within range. Each target's Hit Point maximum and current Hit Points increase by 5 for the duration.

Using a Higher-Level Spell Slot. Each target's Hit Points increase by 5 for each spell slot level above 2.

Level & School
2nd-level abjuration
Casting Time
Action
Range
30 feet
Components
V, S, M (a tiny strip of white cloth)
Duration
8 hours
Classes
Cleric, Paladin

Your spell bolsters your allies with toughness and resolve. Choose up to three creatures within range. Each target's hit point maximum and current hit points increase by 5 for the duration.

Using a Higher-Level Spell Slot. When you cast this spell using a spell slot of 3rd level or higher, a target's hit points increase by an additional 5 for each slot level above 2nd.

Aid 5.5e 2024 vs. 5e 2014 edition differences

The 2024 version adds druid and ranger classes, and clarifies that each target's hit points increase by 5 for each spell slot level above 2, rather than just the additional increase per slot. The core mechanics of hit point increases remain the same.