The Joker

Indestructible.
At the beginning of each players upkeep, they
lose one life.
At the beginning of their main phase, they tap
target creature they don't control.
At the end of their turn, they discard a card
at random.
Artifacts and enchantments cost {3} more to play.
Any player may exile a Legendary creature with toughness 5 or more to exile The Joker.
If you're good at something, you don't do it for free.