Coop, Merchant of the Bureau

Dash {1}{b}{g}
Whenever Coop, Merchant of the Bureau enters
the battlefield or attacks, each opponent draws a
card, then Coop gets +X/+0 until end of turn,
where X is the number of cards your opponents
have drawn this turn.
When Coop leaves the battlefield, draw two
cards, then put X +1/+1 counters on target
creature you control, where X is the number of
cards in your hand.