Thousand-Faced Shadow + Great Whale + Biting-Palm Ninja

Thousand-Faced Shadow

Great Whale

Biting-Palm Ninja

How it works

1. Declare Great Whale and Biting-Palm Ninja as attackers.
2. When they aren't blocked, activate up to seven lands you control by tapping them, adding at least 4.
3. Activate Thousand-Faced Shadow's ninjutsu ability by paying 2 and returning Biting-Palm Ninja from the battlefield to your hand, putting Thousand-Faced Shadow onto the battlefield from your hand tapped and attacking.
4. When Thousand-Faced Shadow enters the battlefield, it triggers, creating a token copy of Great Whale that is tapped and attacking.
5. When the Great Whale token enters the battlefield, it triggers, untapping up to seven lands.
6. Activate Biting-Palm Ninja's ninjutsu ability by paying 2 and returning Thousand-Faced Shadow from the battlefield to your hand, putting Biting-Palm Ninja onto the battlefield from your hand tapped and attacking.
7. Repeat from step 2.
8. Deal combat damage using the Great Whale tokens, dealing infinite combat damage to the defending opponent.
9. If you control up to seven lands that can tap to produce at least 5, this combo nets infinite mana.

This clever loop relies on trading your attackers back and forth from hand to battlefield using their ninjutsu abilities, turning your combat phase into an engine for infinite value. By using Thousand-Faced Shadow's ninjutsu ability to swap out Biting-Palm Ninja, you trigger a fresh copy of Great Whale whose entry ability untaps your lands to pay for the next cycle. You can then use Biting-Palm Ninja's ninjutsu ability to return the Shadow and repeat the process, allowing the accumulating Great Whale tokens to crush your opponent under an army of infinite attackers.