Satoru Umezawa + Yuriko, the Tiger's Shadow + Great Whale

Satoru Umezawa

Yuriko, the Tiger's Shadow

Great Whale

How it works

1. Declare Yuriko as an attacker.
2. When it isn't blocked, activate up to seven lands you control by tapping them, adding at least 2.
3. Activate Great Whale's ninjutsu ability by paying 2 and returning Yuriko from the battlefield to your hand, putting Great Whale onto the battlefield from your hand tapped and attacking.
4. When Great Whale enters the battlefield, it triggers, untapping up to seven lands.
5. Activate Yuriko's ninjutsu ability by paying and returning Great Whale from the battlefield to your hand, putting Yuriko 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 3, this combo nets infinite mana.

This clever loop lets you endlessly bounce your creatures between hand and battlefield by leveraging Satoru Umezawa's static ability, which grants every creature card in your hand ninjutsu for a flat {2}{U}{B}. You begin by substituting an unblocked attacker for Great Whale, whose enters-the-battlefield trigger untaps your lands to refund the mana spent and then some. From there, you use Yuriko, the Tiger's Shadow and her commander ninjutsu to ninja-swap Great Whale right back to your hand for just {U}{B}, resetting the board so you can repeat the process. Satoru Umezawa even rewards your efforts along the way by letting you dig through your library for extra resources as you churn out infinite mana and enter-the-battlefield triggers!