Shaco, the Demon Jester

At the beginning of combat on your turn, create a token that's a copy of target noncreature artifact you control, except its name is Jack In The Box and it's
a 4/4 Construct artifact creature in addition to its other types. It gains haste until end of turn. Sacrifice it at the beginning of the next end step.

Corrupted by dark magic and the loss of his beloved charge, the once-kind puppet finds pleasure only in the misery of the poor souls he torments.