This clever mana-generation loop turns Singing Bell Strike—a card usually meant to lock down an opponent's threat—into an untap engine for your own creature by enchanting Heronblade Elite. Once Heronblade Elite's power is pumped up to seven or higher, tapping it for its mana ability more than pays for the text granted by Singing Bell Strike's activation cost. This lets you repeatedly untap Heronblade Elite to generate an arbitrarily large amount of colored mana.