Satoru Umezawa + Silver-Fur Master + Great Whale

Satoru Umezawa

Silver-Fur Master

Great Whale

How it works

1. Declare another nontoken creature as an attacker.
2. When the creature isn't blocked by an opponent, activate up to seven lands you control by tapping them, adding at least 3.
3. Activate Great Whale's ninjitsu ability by paying 1 and returning the unblocked creature to your hand, putting Great Whale onto the battlefield tapped and attacking.
4. Great Whale enters the battlefield, untapping the seven lands.
5. Activate any creature card in your hand's ninjitsu ability by paying 1 and returning Great Whale to your hand, putting the creature onto the battlefield tapped and attacking.
6. Activate up to seven lands you control by tapping them, adding at least 3.
7. Repeat from step 3.

This clever loop turns the ninjutsu mechanic into a mana-positive engine by using Satoru Umezawa to grant ninjutsu to every creature in your hand, while Silver-Fur Master steps in as the cost reducer that makes each exchange cheaper than the mana generated. When you declare an unblocked attacker and swap it for Great Whale, the Whale's entry triggers to untap your lands and leave you with a surplus of mana. From there, you simply bounce Great Whale back to your hand using another creature's ninjutsu—which itself gets discounted by Silver-Fur Master—restarting the cycle and letting you generate infinite mana and boundless enter-the-battlefield triggers.