Lurking Swamp Terror

Swampwalk
Whenever Lurking Swamp Terror deals combat
damage to a player, that player discards a card
and you draw a card.
If Lurking Swamp Terror attacks and isn't
blocked, you may pay {x}. If you do, return
Lurking Swamp Terror to your hand and create
X 1/1 green Frog creature tokens.