How can you create a combo with Satoru Umezawa, Palinchron, Great Whale?
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[START OF COMBO]This combo can be formed with Satoru Umezawa, Palinchron, Great Whale

Color identity: UB
Mana cost: 
Steps:
  1. Declare Great Whale as an attacker.
  2. When Great Whale is unblocked, activate up to seven lands you control by tapping them, adding at least {3}{U}{B}.
  3. Activate Palinchron's ninjitsu ability by paying {2}{U}{B} and returning Great Whale from the battlefield to your hand, putting Palinchron from your hand onto the battlefield tapped and attacking.
  4. Palinchron enters the battlefield, untapping up to seven lands.
  5. Activate up to seven lands you control by tapping them, adding at least {3}{U}{B}.
  6. Activate Great Whale's ninjitsu ability by paying {2}{U}{B} and returning Palinchron from the battlefield to your hand, putting Great Whale from your hand onto the battlefield tapped and attacking.
  7. Great Whale enters the battlefield, untapping up to seven lands.
  8. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mana lands you control can produce
  - Infinite untap of lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Satoru Umezawa must be on the battlefield
  - Palinchron must be in your hand
  - Great Whale must be on the battlefield
  - Great Whale does not have summoning sickness and cannot be blocked and killed by an opponent.
  - You control up to seven lands that can tap to produce at least {3}{U}{B}.
[END OF COMBO PREREQUISITES]
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