Underground Dragger (SKL-081) [The Seven Kings of the Lands]

[Stealth] You control a darkness magic stone and a resonator was put into a graveyard from your field this turn. (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, destroy target resonator your opponent controls that dealt damage this turn.