Summon: G.F. Cerberus + Biovisionary + Croaking Counterpart

Summon: G.F. Cerberus

Biovisionary

Croaking Counterpart

How it works

1. At the beginning of your precombat main phase. Summon: G.F. Cerberus triggers, putting a lore counter on it and triggering its third chapter ability, copying the next instant or sorcery spell you cast twice.
2. Cast Croaking Counterpart by paying its mana cost, targeting Biovisionary.
3. Summon: G.F. Cerberus triggers, copying Croaking Counterpart twice, with the copies targeting Biovisionary.
4. Resolve all Croaking Counterparts, copying Biovisionary three times.
5. At the beginning of your end step, each Biovisionary triggers. Resolve the first trigger, causing you to win the game.

This cunning scheme relies on Summon: G.F. Cerberus to supercharge a single spell into a game-winning flurry. By stacking its lore counters up to chapter III, the Saga sets you up to copy your next instant or sorcery twice. When you cast Croaking Counterpart targeting Biovisionary, the enchantment immediately doubles it into three total spell instances. These tokens resolve to create the exact quorum of copies needed for Biovisionary's beginning-of-end-step condition, instantly sealing your victory before your opponents can react.