Card
Karn's Temporal Sundering
Mana cost {4}{U}{U}
(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.) Target player takes an extra turn after this one. Return up to one target nonland permanent to its owner's hand. Exile Karn's Temporal Sundering.
Extra-turn card: not allowed in brackets 1–2, two at most in bracket 3. Part of 26 known combos, one of them two-card. 3 official rulings.
- Commander
- Legal
- Printing
- Rare · DOM · #55
- Cheapest printing
- €1.28
- EDHREC salt
- 0.88
- Color identity
- Blue
Bracket
- B1 Exhibition — not allowed: Extra-turn cards are not allowed
- B2 Core — not allowed: Extra-turn cards are not allowed
- B3 Upgraded — Not in the same deck as its early two-card combo partner: Panoptic Mirror
- B4 Optimized — allowed: No restriction beyond the banned list
- B5 cEDH — allowed: No restriction beyond the banned list
Why
- Extra-turn card, two at most in bracket 3 (Lotus Vault house cap)
- Two-card combo with Panoptic Mirror (early with Panoptic Mirror)
How Lotus Vault estimates a bracket
Bracket: Lotus Vault analysis, with Commander Spellbook flags
Combos
26 known combos, one of them two-card.
- Panoptic Mirror + Karn's Temporal Sundering
Produces: Infinite turns, Lock
View on Commander Spellbook - Taigam, Master Opportunist + Clockspinning + Karn's Temporal Sundering
Produces: Infinite turns, Lock
View on Commander Spellbook - God-Eternal Kefnet + Scroll Rack + Karn's Temporal Sundering
Produces: Infinite turns, Skip your draw steps, Lock
View on Commander Spellbook
Combos: Commander Spellbook
Rulings
- 2018-04-27 · Wizards of the Coast
You can’t cast a legendary sorcery unless you control a legendary creature or a legendary planeswalker. Once you begin to cast a legendary sorcery, losing control of your legendary creatures and planeswalkers won’t affect that spell. - 2018-04-27 · Wizards of the Coast
If the target player or target nonland permanent is an illegal target as Karn’s Temporal Sundering resolves, the other target is affected as normal and Karn’s Temporal Sundering is exiled. If both targets are illegal, Karn’s Temporal Sundering doesn’t resolve and isn’t exiled. - 2018-04-27 · Wizards of the Coast
Other than the casting restriction, the legendary supertype on a sorcery carries no additional rules. You may cast any number of legendary sorceries in a turn, and your deck may contain any number of legendary cards (but no more than four of any with the same name).
Rulings: Scryfall · Wizards of the Coast