Satoru Umezawa + Great Whale + Azra Smokeshaper

Satoru Umezawa
Great Whale
Azra Smokeshaper

Requires
Satoru Umezawa must be on the battlefield. Great Whale must be in hand. Azra Smokeshaper must be on the battlefield. Azra Smokeshaper 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 3.
Steps
  1. Declare Azra Smokeshaper as an attacker.
  2. When it isn't blocked, activate up to seven lands you control by tapping them, adding at least 3.
  3. Activate Great Whale's ninjutsu ability by paying 2 and returning Azra Smokeshaper 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 Azra Smokeshaper's ninjutsu ability by paying 1 and returning Great Whale from the battlefield to your hand, putting Azra Smokeshaper 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 4, this combo nets infinite mana.
Results
Infinite ETB. Infinite LTB. Infinite mana lands you control can produce. Infinite untap of lands you control.

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