Underworld Breach + Grinding Station + Mana Crypt

Underworld Breach
Grinding Station
Mana Crypt

Requires
All permanents on the battlefield.
Steps
  1. Activate Mana Crypt by tapping it, adding cc
  2. Activate Grinding Station by tapping it and sacrificing Mana Crypt, causing yourself to mill three cards
  3. Cast Mana Crypt from your graveyard for its escape cost by exiling three cards from your graveyard
  4. Grinding Station triggers, untapping itself
  5. Repeat
Results
Infinite self-mill. Near-infinite colorless mana. Near-infinite storm count.