Satoru Umezawa, Great Whale, and Mist-Syndicate Naga

Prerequisites

• Satoru Umezawa on the battlefield
• Great Whale in hand
• Mist-Syndicate Naga on the battlefield
• Mist-Syndicate Naga does not have summoning sickness and cannot be blocked by an opponent
• You control up to seven lands that can tap to produce at least

Steps

1. Declare Mist-Syndicate Naga as an attacker
2. When it isn't blocked, activate up to seven lands you control by tapping them, adding at least
3. Activate Great Whale's ninjutsu ability by paying and returning Mist-Syndicate Naga 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 Mist-Syndicate Naga's ninjutsu ability by paying and returning Great Whale from the battlefield to your hand, putting Mist-Syndicate Naga 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 , this combo nets infinite mana

Results

• Infinite ETB
• Infinite LTB