Dark Rezzard, the Dying Shadow (TTW-082) [The Twilight Wanderer]

[Stealth] You control three or more Shadow resonators. (While this card is in your chant-standby area, you may play it without paying its cost when its Stealth condition is met.) When this card enters your field from a chant-standby area, you may banish another resonator. If you do, your opponent discards a card and banishes a resonator.