This delightful loop transforms your fallen allies into a permanent, self-sustaining cascade of winged horseflesh. When you send Ondu Spiritdancer to the graveyard, Myrkul, Lord of Bones steps in with his unique brand of necromancy, exiling the dancer to resurrect it as an enchantment rather than a creature. Because that new token is an enchantment entering the battlefield, it triggers its own copying ability alongside Archon of Sun's Grace; the Archon rewards you with a 2/2 flying Pegasus token while the enchanted Ondu Spiritdancer spawns yet another copy of itself. This triggers the cycle anew, letting you loop the process to generate an infinite army of Pegasi and endless enchantment ETB triggers.