Firebolt

Firebolt is the starting ability of the Imp, a warlock minion. It is the Imp's only method of attack. As its name suggests, this spell launches a bolt of fire at the Imp's target.

The Firebolt can be resisted, which definitely hurts the Imp. However, the Imp can crit with its Firebolts for extra damage.

Auto-cast may be turned off. However, given this is the Imp's only offensive ability, turning off this ability is equivalent to putting the Imp on passive mode.