Persephone, the Nether Empress (SKL-075) [The Seven Kings of the Lands]

[Stealth] Your J/ruler is "Rezzard, the Undead Lord" or "Rezzard, the Desecrating Vampire" and you have more than ten or more cards in your graveyard. (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, put target resonator with total cost 4 or less from your graveyard into your field.