Seirvit, Dealer of Mysteries

Code: Draw your fourth card in a turn (Whenever an opponent draws their fourth card in a turn, they crack this creature's code.)
Seirvit, Dealer of Mysteries can't be blocked unless an opponent has cracked it's code.
{2}: Draw a card, then put a +1/+1 counter on Seirvit, Dealer of Mysteries if you are an opponent who hasn't cracked it's code.
Any player may activate this ability.