Vicious Monkey

A twisted version of Find Familiar spell, Vicious Monkey creates a rabid fey monkey that mauls the hell out of the nearest target to where it is summoned. The monkey immediately uses up to its full movement (40 ft., climb 40ft.) if necessary to reach its target, and makes a melee attack using your spell attack modifier. The damage is 1d6 bludgeoning and increases to 2d6 at level 5, 3d6 at level 15 and 4d6 at level 20. The monkey may use its reaction to make an opportunity attack should the opportunity arise. Unlike normal familiars, it may only make the attack action and it disappears at the start of your next turn.