Doppelgang, and Cormela, Glamour Thief

Prerequisites

• Doppelgang in hand
• Cormela, Glamour Thief on the battlefield
• available

Steps

1. Activate Cormela by paying and tapping it, adding that can only be spent to cast instant or sorcery spells
2. Cast Doppelgang by paying , creating four token copies of Cormela and of the three mana-producing permanents
3. Put the tapped Cormela and all but one Cormela token into your graveyard due to the legend rule, triggering each of them once
4. Resolve the first Cormela trigger, returning Doppelgang from your graveyard to your hand
5. Resolve all remaining Cormela triggers
6. Activate twelve of the mana-producing permanent tokens by tapping them, adding at least
7. Repeat

Results

• Infinite ETB
• Infinite storm count
• Infinite creature tokens
• Infinite magecraft triggers
• Infinite landfall triggers
• Infinite casts of instants and sorceries in your hand and graveyard
• Infinite copies of any permanent on the battlefield
• Infinite mana permanents can produce