Power level: optimised-competitive rogue
Approximate number of test games played: 100-200
Original deckbuilder: ertai
Original list: https://tilde.town/~ertai/mtg/decklists/modern/sundial/blue/
Last updated: 2026-07-22
MAINBOARD
4 Sundial of the Infinite
4 Scalding Tarn
4 Arid Mesa
1 Raugrin Triome
2 Hallowed Fountain
2 Steam Vents
2 Mountain
6 Island
1 Plains
4 Ideas Unbound
2 Arena of Glory
2 Unholy Heat
3 Phelia, Exuberant Shepherd
2 Thundertrap Trainer
3 Morningtide's Light
4 Quantum Riddler
2 Consign to Memory
3 Tamiyo, Inquisitive Student
3 Chance for Glory
2 Preordain
4 Fable of the Mirror-Breaker
SIDEBOARD
1 Sudden Disappearance
1 Morningtide's Light
1 Thundertrap Trainer
4 Damping Sphere
4 Relic of Progenitus
4 Kami of False Hope
The whole deck is synergising around Sundial essentially. You use it to remove delayed triggered abilities with negative effects, like Chance for Glory saying you lose the game, but also Phelia / Morningtide's Light returning your opponent's stuff, Warp on Quantum Riddler, sacrificing the kiki-jiki tokens and discarding cards to Ideas Unbound.
You can turbo flip Tamiyo T2 with Ideas Unbound. It's a powerful play if you know your opponent will struggle to deal damage to it, as the ultimate essentially insta wins the game because of the extra turns in the deck.
Tamiyo flipped is quite strong as it lets you get your extra turns back
You can also use Sundial during your turn in response to your opponent casting a spell or activating an ability to exile the stack. Sometimes catches end step stuff like fetchlands, Bowmasters ect...
Kami of False hope will perma fog as long as you have a Kiki-jiki.
I spent a lot of time building this and tried many different strategies and colors, this is likely to be the best you can get with Sundial. Sideboard could likely be optimised however.