Satoru Umezawa + Great Whale + Covert Technician

Prerequisites

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

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite mana lands you control can produce
• Infinite untap of lands you control