Lord Skitter, Sewer King + Void Attendant + Pitiless Plunderer + Arcane Adaptation

Prerequisites

• An opponent has a card in exile.
• "Rat" chosen with Arcane Adaptation.

Steps

1. 1Activate Void Attendant by paying and putting a card an opponent owns from exile into their graveyard, creating a 1/1 Eldrazi Scion creature token.
2. 2When the Eldrazi Scion enters the battlefield as a Rat due to Arcane Adaptation, Lord Skitter's first ability triggers, exiling a card from an opponent's graveyard.
3. 3Activate the Eldrazi Scion by sacrificing it, adding .
4. 4When the Eldrazi Scion dies, Pitiless Plunderer triggers, creating a Treasure artifact token.
5. 5Activate the Treasure by tapping and sacrificing it, adding .
6. 6Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers