Requires

Carth the Lion must be on the battlefield. Karn, the Great Creator must be on the battlefield. Ugin's Nexus must be on the battlefield. The Chain Veil must be on the battlefield. Ashnod's Altar must be on the battlefield. Mana needed: on your first turn, with available on all subsequent turns

Steps

1. Activate Karn's first loyalty ability by putting two loyalty counters on it, causing Ugin's Nexus to become an artifact creature until end of turn.
2. Activate Ashnod's Altar by exiling Ugin's Nexus, adding .
3. Ugin's Nexus triggers, causing you to take an extra turn after this one.
4. Activate The Chain Veil by paying and tapping it, allowing you to activate all planeswalker abilities an extra time this turn.
5. Activate Karn's second loyalty ability by removing a loyalty counter from it, returning Ugin's Nexus from exile to your hand.
6. Move to your next turn.
7. Cast Ugin's Nexus by paying .
8. Repeat.

Results