Misteltein, the Pious Sword Saint (Secret) (SNV-SEC001) [The Strangers of New Valhalla]

[Enter] -> You may pay 1W less to play your next rune. Whenever you play a rune from a rune area -> Put target resonator with total cost 3 or less from your graveyard into the field. Whenever this card blocks or is blocked by a resonator -> Destroy that resonator.