Ability Copy

Effects that copy an activated or triggered ability already on the stack, so it resolves a second time for one set of costs. Strionic Resonator copies a triggered ability, Rings of Brighthearth and Illusionist's Bracers copy activated abilities, and Lithoform Engine can copy either kind. Distinct from Spell Copy, which copies instant and sorcery spells rather than abilities, and from Token Copy, which makes a token duplicate of a permanent. Also separate from doubling effects that create an extra instance of a trigger without putting a copy on the stack.