Woodfall Primus + Melira, Sylvok Outcast + Ashnod's Altar

Woodfall Primus
Melira, Sylvok Outcast
Ashnod's Altar

Requires
All permanents on the battlefield. Woodfall Primus does not have a -1/-1 counters on it.
Steps
  1. Activate Ashnod's Altar by sacrificing Woodfall Primus, adding cc
  2. Woodfall Primus's persist ability triggers, returning it to the battlefield
  3. Woodfall Primus enters the battlefield, triggering its ability
  4. Holding priority, repeat an arbitrarily large number of times
  5. Resolve all Woodfall Primus abilities, destroying any number of noncreature permanents
  6. Repeat
Results
Destroy any number of noncreature permanents. Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite colorless mana.