Skyship Ballista

Skyship Ballista enters the battlefield with X
+1/+1 counters on it.
Flying
Whenever Skyship Ballista deals combat damage
to a player, draw two cards then discard a card.
Whenever you draw a card, put a +1/+1 counter
on Skyship Ballista.
Remove a +1/+1 counter from Skyship Ballista:
Deal 1 damage to any target.
Crew 3