Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Mirror-Mad Phantasm that is a 1/1 Frog.
Activate the Mirror-Mad Phantasm token by paying {1}{U}, shuffling the token into your library and milling your entire library due to it not having a card named Mirror-Mad Phantasm in it.

Infinite self-mill

Mirror-Mad Phantasm

Croaking Counterpart

Cast Croaking Counterpart by paying {1}{G}{U}, targeting Biovisionary.
Holding priority, cast Increasing Vengeance from your graveyard for its flashback cost by paying {3}{R}{R}, copying Croaking Counterpart twice, with both copies targeting Biovisionary.
Resolve all Croaking Counterparts, creating three token copies of Biovisionary that are 1/1 Frogs.
At the beginning of your end step, each Biovisionary triggers.
Resolve the first trigger, causing you to win the game.

Win the game

Biovisionary

Increasing Vengeance

Cast Complete the Circuit by paying {5}{U}, causing you to copy the next instant or sorcery spell you cast twice.
Cast Croaking Counterpart by paying {1}{G}{U}, targeting Biovisionary.
Complete the Circuit triggers, copying Croaking Counterpart twice, with both copies targeting Biovisionary.
Resolve all Croaking Counterparts, creating three token copies of Biovisionary that are 1/1 Frogs.
At the beginning of your end step, each Biovisionary triggers.
Resolve the first trigger, causing you to win the game.

Complete the Circuit

Cast Storm King's Thunder by paying {2}{R}{R}{R}, copying the next instant or sorcery spell you cast twice.
Cast Croaking Counterpart by paying {1}{G}{U}, targeting Biovisionary.
Storm King's Thunder triggers, copying Croaking Counterpart twice, with both copies targeting Biovisionary.
Resolve all Croaking Counterparts, creating three token copies of Biovisionary that are 1/1 Frogs.
At the beginning of your end step, each Biovisionary triggers.
Resolve the first trigger, causing you to win the game.

Storm King's Thunder

Cast Finale of Promise by paying {10}{R}{R}, causing you to cast Croaking Counterpart from your graveyard without paying its mana cost and copying it twice, with all spells targeting Biovisionary.
Resolve all Croaking Counterparts, creating three token copies of Biovisionary that are 1/1 Frogs.
At the beginning of your end step, each Biovisionary you control triggers.
Resolve the first trigger, causing you to win the game.

Finale of Promise

Cast Repeated Reverberation by paying {2}{R}{R}, copying the next instant or sorcery spell you cast twice.
Cast Croaking Counterpart by paying {1}{G}{U}, targeting Biovisionary.
Repeated Reverberation triggers, copying Croaking Counterpart twice, with both copies targeting Biovisionary.
Resolve all Croaking Counterparts, creating three token copies of Biovisionary that are 1/1 Frogs.
At the beginning of your end step, each Biovisionary triggers.
Resolve the first trigger, causing you to win the game.

Repeated Reverberation

Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Enduring Scalelord that is a 1/1 Frog.
Put a +1/+1 counter on either Enduring Scalelord.
The Enduring Scalelord who didn't have the counter put on it triggers, putting a +1/+1 counter on itself.
Repeat step 3.

Infinite +1/+1 counters on a creature token

Infinite +1/+1 counters on Enduring Scalelord

Enduring Scalelord

Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Icewind Stalwart that is a 1/1 Frog.
When the Icewind Stalwart token enters the battlefield, it triggers, blinking any non-Warrior you control with base power 4 or greater.
When the creature enters the battlefield, Life Finds A Way triggers, creating a token copy of the Icewind Stalwart token.
Repeat from step 2.

Infinite blinking of creatures you control with base power 4 or greater

Infinite creature tokens

Infinite ETB

Infinite LTB

Icewind Stalwart

Life Finds a Way

Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Restoration Angel that is a 1/1 Frog.
When the Restoration Angel token enters the battlefield, it triggers, blinking any non-Angel you control with base power 4 or greater.
When the creature enters the battlefield, Life Finds A Way triggers, creating a token copy of the Restoration Angel token.
Repeat from step 2.

Restoration Angel

Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Wispweaver Angel that is a 1/1 Frog.
When the Wispweaver Angel token enters the battlefield, it triggers, blinking any creature you control with base power 4 or greater.
When the creature enters the battlefield, Life Finds A Way triggers, creating a token copy of the Wispweaver Angel token.
Repeat from step 2.

Wispweaver Angel

Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Felidar Guardian that is a 1/1 Frog.
When the Felidar Guardian token enters the battlefield, it triggers, blinking any creature you control with base power 4 or greater.
When the creature enters the battlefield, Life Finds A Way triggers, creating a token copy of the Felidar Guardian token.
Repeat from step 2.

Felidar Guardian

Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Wildwood Scourge that is a 1/1 Frog.
Put a +1/+1 counter on either Wildwood Scourge.
The Wildwood Scourge who didn't have the counter put on it triggers, putting a +1/+1 counter on itself.
Repeat step 3.

Infinite +1/+1 counters on Wildwood Scourge

Wildwood Scourge

Conspiracy

Cast Croaking Counterpart by paying {1}{G}{U}, creating a token copy of Deadeye Navigator that is a 1/1 green Frog.
The Deadeye Navigator token enters the battlefield, triggering its soulbond ability, pairing it and Ixidron.
Activate Ixidron by paying {U}, blinking it.
All other nontoken creatures you control are turned face-down as Ixidron enters the battlefield.
Ixidron enters the battlefield, triggering the token Deadeye Navigator's soulbond ability, repairing Ixidron and the token Deadeye Navigator.
Activate Rattleclaw Mystic's morph ability by paying {1}, turning it face up.
Rattleclaw Mystic triggers, adding {G}{U}{R}.
Repeat from step 3.

Search Results