Satoru Umezawa + Palinchron + Walker of Secret Ways

Satoru Umezawa

Palinchron

Walker of Secret Ways

How it works

1. Declare Walker of Secret Ways as an attacker.
2. When it isn't blocked, activate up to seven lands you control by tapping them, adding at least 3.
3. Activate Palinchron's ninjutsu ability by paying 2 and returning Walker of Secret Ways from the battlefield to your hand, putting Palinchron onto the battlefield from your hand tapped and attacking.
4. When Palinchron enters the battlefield, it triggers, untapping up to seven lands.
5. Activate Walker of Secret Ways's ninjutsu ability by paying 1 and returning Palinchron from the battlefield to your hand, putting Walker of Secret Ways onto the battlefield from your hand tapped and attacking.
6. Repeat from step 2.
7. If you control up to seven lands that can tap to produce at least 4, this combo nets infinite mana.

This clever loop relies on Satoru Umezawa granting every creature in your hand ninjutsu for {2}{U}{B}, allowing you to bypass normal casting restrictions. You use this ability to ninja in Palinchron, whose enters-the-battlefield trigger untaps your lands to refund your mana while leaving a profit. From there, Walker of Secret Ways steps back in using its own cheap ninjutsu cost to bounce Palinchron safely to your hand. By endlessly trading places between the battlefield and your hand, you generate infinite mana and creature triggers.