Dryad Arbor + Deadeye Navigator + Nissa, Resurgent Animist + Panharmonicon

Dryad Arbor
Deadeye Navigator
Nissa, Resurgent Animist
Panharmonicon

Requires
All permanents on the battlefield. Deadeye Navigator is paired with Dryad Arbor. 1u available.
Steps
  1. Activate Dryad Arbor by paying 1u, blinking it
  2. Dryad Arbor enters the battlefield, triggering Deadeye Navigator's soulbond ability and Nissa twice
  3. Resolve both Nissa triggers, adding 1u
  4. Resolve both Deadeye Navigator triggers, repairing it and Dryad Arbor
  5. Repeat
Results
Infinite ETB. Infinite LTB. Infinite landfall triggers.