This elegant loop turns a simple Elf into a self-sustaining mana engine by exploiting the synergy between untapping mana production and creature-bouncing. Priest of Titania generates a surplus of green mana based on the Elves present, which immediately fuels Temur Sabertooth's ability to bounce the Priest back to your hand for reuse. Meanwhile, Shang-Chi, Master of Kung Fu proves essential by granting haste to your creature abilities, allowing Priest of Titania to be tapped and retapped the very moment it hits the board without waiting for summoning sickness. Together, they create an endless cycle of casting, tapping, and returning that floods your pool with infinite green mana while churning out endless enters-the-battlefield triggers.