Poison-Scattered Rat

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
When this creature attacks a player who has "Poison" in his hand, double the number of "Poison" in that player's hand.
If the player does not have "Poison" in his hand, he creates 3 copies of that card in his hand instead.