Battletide

Battletide was a divine spell wielded by clerics of Bane and Iyachtu Xvim allowed a caster to sap the energy from nearby beings and transfer it to themself.

Effects
Any lifeforms near to the caster, at a radius of at least 25' (7.6m), a would be slowed in their actions, feeling extremely lethargic. If any creatures, or people, who were hostile to the caster were within this area of effect, the caster be able to act with increased swiftness.

The effects of battletide could be negated by an antimagic field or a successful casting of dispel magic.