Corridor Monitor + Great Whale + Livio, Oathsworn Sentinel

WU identity

Commander legal

The 3 combo pieces

What must be in place

Livio does not have summoning sickness.
You control up to seven lands that can tap to produce at least {5}{W}{W}{W}.

How to execute it

  1. Activate up to seven mana-producing lands by tapping them, adding at least {5}{W}{W}{W}.
  2. Activate Livio's first ability twice by paying {2}{W}{W}, exiling Great Whale and Corridor Monitor with aegis counters on them.
  3. Activate Livio's second ability by paying {2}{W} and tapping it, returning Great Whale and Corridor Monitor from exile to the battlefield.
  4. Corridor Monitor and Great Whale enter the battlefield, triggering their abilities.
  5. Resolve the Great Whale trigger, untapping up to seven lands you control.
  6. Resolve the Corridor Monitor trigger, untapping Livio.
  7. Repeat.

What the combo produces