Thousand-Faced Shadow + Palinchron + Throat Slitter

Thousand-Faced Shadow

Palinchron

Throat Slitter

How it works

1. Declare Palinchron and Throat Slitter 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 Throat Slitter 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 Palinchron that is tapped and attacking.
5. When the Palinchron token enters the battlefield, it triggers, untapping up to seven lands.
6. Activate Throat Slitter's ninjutsu ability by paying 2 and returning Thousand-Faced Shadow from the battlefield to your hand, putting Throat Slitter onto the battlefield from your hand tapped and attacking.
7. Repeat from step 2.
8. Deal combat damage using the Palinchron 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 elegant loop exploits the repeating-entry synergy between Thousand-Faced Shadow and Palinchron to constantly churn out fresh copies of the Leviathan. As Thousand-Faced Shadow enters the battlefield attacking, its triggered ability clones the original Palinchron, whose own entry trigger untaps your lands to pay for the continuous ninja swapping. Meanwhile, Throat Slitter serves as an alternate attacker to bounce your Thousand-Faced Shadow back to hand, ensuring you can keep paying the ninjutsu costs while clearing away any potential blockers the opponent might try to field.