"Where is it written that beasts must cause pain?"Delif, Ponderings
FE • ENMark Tedin
™ & © 1993—1994 Wizards of the Coast
Legal in: Legacy,Vintage,Commander
Oracle Text (click to copy):
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10/4/2004 If you use the ability after blockers are declared, it won't trigger at all. So you want to use it before blockers are declared. 10/4/2004 This card has an activated ability that creates a triggered ability which watches the target creature. 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.