Karador, Ghost Chieftain, World Shaper, Walk the Aeons, and Ashnod's Altar

Prerequisites

• Karador, Ghost Chieftain on the battlefield
• World Shaper on the battlefield
• Walk the Aeons in hand
• Ashnod's Altar on the battlefield
• You control at least three Islands
• You have not cast a creature spell using Karador this turn
• each turn available

Steps

1. Activate three Islands by tapping them, adding
2. Cast Walk the Aeons with buyback by paying and sacrificing three Islands, causing you to take an extra turn after this one and return Walk the Aeons to your hand
3. Activate Ashnod's Altar by sacrificing World Shaper, adding
4. World Shaper dies, triggering its second ability, returning all land cards from your graveyard to the battlefield tapped
5. Cast World Shaper from your graveyard by paying
6. World Shaper enters the battlefield, triggering its first ability, allowing you to mill three cards
7. Repeat each turn

Results

• Infinite turns