Bloodlust

You awaken a primitive, animalistic mindset in up to three willing creatures within range. While the spell lasts, the targets have advantage on saving throws against effects that would impart the charmed or frightened conditions, and if the target is already affected by those conditions, they may make another saving throw against them with advantage immediately. Once per turn when a target hits with an attack, it deals 1d6 extra damage of the same type. Finally, the targets have advantage on Wisdom (Perception) checks. When the spell ends, each creature affected by it gains a level of exhaustion for as long as the spell lasted.

Using a Higher-Levels Spell Slot. You can target one additional creature for each spell slot level above 2nd.

Adapted from the AD&D 2nd edition book Prayers from the Faithful.