Thousand-Faced Shadow + Palinchron + Walker of Secret Ways
Thousand-Faced Shadow
Palinchron
Walker of Secret Ways
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 Palinchron and Walker of Secret Ways 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 Walker of Secret Ways 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 Palinchron that is tapped and attacking.
When the Palinchron token enters the battlefield, it triggers, untapping up to seven lands.
Activate Walker of Secret Ways's ninjutsu ability by paying 1 and returning Thousand-Faced Shadow from the battlefield to your hand, putting Walker of Secret Ways onto the battlefield from your hand tapped and attacking.
Repeat from step 2.
Deal combat damage using the Palinchron 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 clever ninja loop dances back and forth between the battlefield and your hand to generate an overwhelming advantage, provided your lands can produce enough mana to fund the cycle. By using Thousand-Faced Shadow's ninjutsu ability to swap out Walker of Secret Ways, you continuously churn out fresh Palinchron tokens that untap your lands to pay for the repeated costs. Each iteration leaves behind another flying copy of Palinchron while cycling your ninjas safely through your hand, ultimately building an unstoppable army of attackers that deals infinite combat damage.