Color Identity: U

Initial Card State
- Panoptic Mirror on the battlefield.
- Karn's Temporal Sundering in exile.
Notable Prerequisites
- You control at least one legendary creature and/or planeswalker.
Steps
- At the beginning of your upkeep, Panoptic Mirror triggers, casting a copy of Karn's Temporal Sundering without paying its mana cost.
- Resolve Karn's Temporal Sundering, causing you to take an extra turn after this one.
- Repeat each turn.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).