How about a low level druid boost spell?
Bestial Fury
1st-level enchantment
Casting Time: 1 action
Range: Touch
Components: V, S, M (claws and teeth of a badger)
Duration: Concentration, up to 1 minute
This spell throws a target into a fury. When you touch a creature, that creature may attempt a Wisdom saving throw. On a failure, that creature loses all spell casting abilities and any abilities that require mental concentration and instead gains the rage of a creature of your level or CR. The rage lasts for as long as you concentrate on the spell.
At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the number of affected creates increases by 1 for each slot level above 1st.
Thoughts?
Throat Punch Games 