Shaco, the Deceiver

Invisible—As long as this creature has not dealt combat damage to a player, it has Hexproof and can't be blocked.

When Shaco deals combat damage to a player, that player creates a red Jack in the Box token with "At the beginning of your upkeep, this artifact deals 1 damage to you.".

{1}{u/b}, {t}: Create a 1/1 nonlegendary token copy of this creature with Haste.