Unstable Shapeshifter, Chainer, Nightmare Adept, Infinite Reflection, and Liliana, Dreadhorde General

Prerequisites

• Unstable Shapeshifter on the battlefield
• Chainer, Nightmare Adept in hand or on the battlefield or in the command zone or in exile or in the graveyard or in the library
• Infinite Reflection on the battlefield
• Liliana, Dreadhorde General on the battlefield
• Infinite Reflection attached to Unstable Shapeshifter

Steps

1. Discard a card to activate Unstable Shapeshifter's ability from Chainer, allowing you to cast a creature spell from your graveyard this turn
2. Cast a creature spell from your graveyard by paying
3. Due to Infinite Reflection, that creature enters the battlefield as a copy of Unstable Shifter copying Chainer
4. Put that creature in the graveyard due to the legend rule
5. That creature entering the battlefield and dying triggers its own Chainer ability, Unstable Shapeshifter's Chainer ability, and Unstable Shapeshifter's original ability
6. Resolve the two Chainer triggers, failing to grant anything haste
7. Resolve the Liliana trigger, drawing a card
8. Resolve the Unstable Shapeshifter ability, causing it to become a new copy of Chainer that has not yet activated its ability this turn
9. Repeat

Results

• Near-infinite ETB
• Infinite draw triggers
• Infinite looting
• Near-infinite storm count
• Near-infinite self-discard triggers
• Near-infinite LTB
• Near-infinite death triggers