Whenever Murk Dwellers attacks and isn't blocked, it gets +2/+0 until end of combat.
When Raganorn unsealed the catacombs, he found more than the dead and their treasures.
Official Rulings for Murk Dwellers
4/15/2013 : An ability that triggers when something "attacks and isn't blocked" triggers in the declare blockers step after blockers are declared if (1) that creature is attacking and (2) no creatures are declared to block it. It will trigger even if that creature was put onto the battlefield attacking rather than having been declared as an attacker in the declare attackers step.
Comments on Murk Dwellers
Feel free to post any comments or questions you have on Murk Dwellers. Please be respectful of others. Any spam or trolling posts will be removed. Repeat offenders may be banned.