Great Whale, Kappa Tech-Wrecker, and Satoru Umezawa

Prerequisites

• Great Whale in hand
• Kappa Tech-Wrecker on the battlefield
• Satoru Umezawa on the battlefield
• Kappa Tech-Wrecker 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 Kappa Tech-Wrecker 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 Kappa Tech-Wrecker 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 Kappa Tech-Wrecker's ninjutsu ability by paying and returning Great Whale from the battlefield to your hand, putting Kappa Tech-Wrecker 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
• Infinite mana lands you control can produce
• Infinite untap of lands you control