For the rest of the battle Worms you play deal +1 damage.
Worm Rider has a 15% chance to deal +1 damage for each Worm in your deck.
Though many goblins are productive members of society, and some have earned themselves fame as heroes, their more vicious kindred are sinister indeed. Subterranean goblin marauders have been known to murder travelers and wear their hair as ghastly trophies. It's those brutal tribes which learned to harness the terrible might of the underground realm's worms. And their monstrous beasts have to be fed...