Thousand-Faced Shadow + Great Whale + Kappa Tech-Wrecker
Thousand-Faced Shadow
Great Whale
Kappa Tech-Wrecker
Infinite combat damage to one opponentInfinite creature tokensInfinite creature ETBInfinite creature LTBInfinite mana lands you control can produceInfinite untap of lands you control
How it works
Declare Great Whale and Kappa Tech-Wrecker as attackers.
When they aren't blocked, activate up to seven lands you control by tapping them, adding at least 3.
Activate Thousand-Faced Shadow's ninjutsu ability by paying 2 and returning Kappa Tech-Wrecker from the battlefield to your hand, putting Thousand-Faced Shadow onto the battlefield from your hand tapped and attacking.
When Thousand-Faced Shadow enters the battlefield, it triggers, creating a token copy of Great Whale that is tapped and attacking.
When the Great Whale token enters the battlefield, it triggers, untapping up to seven lands.
Activate Kappa Tech-Wrecker's ninjutsu ability by paying 1 and returning Thousand-Faced Shadow from the battlefield to your hand, putting Kappa Tech-Wrecker onto the battlefield from your hand tapped and attacking.
Repeat from step 2.
Deal combat damage using the Great Whale tokens, dealing infinite combat damage to the defending opponent.
If you control up to seven lands that can tap to produce at least 4, this combo nets infinite mana.
This loop relies on a clever tag-team of ninjutsu abilities to continuously cycle through the battlefield, using Great Whale to fuel the mana costs with its land-untapping entrance. By bouncing and re-summoning Thousand-Faced Shadow, you constantly flood the board with fresh token copies of the Whale, generating a growing army and untapping your lands over and over. Finally, Kappa Tech-Wrecker steps in to bounce Thousand-Faced Shadow right back to your hand for cheap, keeping the engine running smoothly while laying the groundwork for infinite attacks and game-winning damage.