How can you create a combo with Abuelo, Ancestral Echo, Ugin's Nexus, Replication Specialist?
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[START OF COMBO]This combo can be formed with Abuelo, Ancestral Echo, Ugin's Nexus, Replication Specialist

Color identity: WU
Mana cost: {3}{W}{W}{U}{U}{U} available the first turn, with {2}{W}{U}{U} available each extra turn
Steps:
  1. Activate Abuelo by paying {1}{W}{U}, exiling Ugin's Nexus until the beginning of the next end step.
  2. At the beginning of your end step, Abuelo triggers, returning Ugin's Nexus from exile to the battlefield.
  3. When Ugin's Nexus enters the battlefield, Replication Specialist triggers, causing you to pay {1}{U} to create a token copy of Ugin's Nexus.
  4. Put the token Ugin's Nexus into exile due to the legend rule and its replacement effect, causing you to take an extra turn after this one.
  5. Activate Abuelo by paying {1}{W}{U}, exiling Ugin's Nexus until the beginning of the next end step.
  6. Move to your next turn, not skipping it as Ugin's Nexus is not on the battlefield.
  7. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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