Bog-Strider Ash

Bog-Strider Ash

Creature - Treefolk Shaman | Power/Toughness: 2 / 4 (CMC 4)
Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Whenever a player casts a Goblin spell, you may pay . If you do, you gain 2 life.