This loop works by leveraging Animar, Soul of Elements to steadily drive down the cost of creature spells with accumulated +1/+1 counters until Karametra's Acolyte costs next to nothing to recast. Once your green devotion generates an excess of mana from Karametra's Acolyte, Temur Sabertooth steps in as the engine to bounce and replay the Acolyte repeatedly for an infinite loop of enters-the-battlefield triggers. With Purphoros, Bronze-Blooded granting haste across your board, all those cascading creature triggers translate directly into a devastating storm count and an overwhelming wave of damage to close out the game.