How it grades
Fundamentals 61/100.
No single established archetype dominates. This is its own brew around Teferi, Temporal Archmage, so the fundamentals below carry the grade. Teferi, Temporal Archmage sits on the cEDH tier list, so the ceiling here is tournament-grade, and experienced tables will treat it that way. Its strongest fundamental is mana reliability (Your spells reliably arrive on time for this curve); the first thing to tighten is commander synergy: Only 0 of 61 spells play into your commanders' plan. Counts the builds players run with your commanders (Artifacts; from EDHREC).
- A+Mana reliability
- B+Land count
- B-Mana curve
- ARamp
- A+Card draw
- A+Interaction
- FCommander synergy
- BWin conditions
- BCard quality
- A+Legality & size
Where it falls short
- B+Land count38 lands. About 41 fits this curve, with Sapphire Medallion's discount counted.
- B-Mana curve25% of spells cost ≤2, 25% cost 6+.
- FCommander synergyOnly 0 of 61 spells play into your commanders' plan. Counts the builds players run with your commanders (Artifacts; from EDHREC).
- BWin conditions17 threats (want 18+) and no combo found. This deck can win, but slowly.
- BCard qualityMedian EDHREC rank #7,461 · 1 game-changer
Strong on mana reliability, ramp, card draw, interaction and legality & size.
72 cards graded: A- 4, B+ 11, B 37, B- 10, C+ 7, C 3. The command zone is the plan, so it isn't graded.
Upgrades

Unwinding Clock4$21.72
In place of Dulcet Sirens: doesn't ramp, draw, interact or threaten. What is it for? (40/100)
Pays off your artifact engine (17 producers). Fits the artifact build players run with your commanders. Top-5% staple by play data.

Emry, Lurker of the Loch2U$0.63
In place of Infinite Reflection: doesn't ramp, draw, interact or threaten. What is it for? (40/100)
Fuels your graveyard payoffs (3 in deck). Pays off your artifact engine (17 producers). Fits the artifact build players run with your commanders.

Thought Monitor6U$0.33
In place of Riptide Survivor: weakest slot in the deck (47/100)
Pays off your artifact engine (17 producers). Fits the artifact build players run with your commanders. Top-5% staple by play data.

Urza, Lord High Artificer2UU$16.28
In place of Shaper Parasite: rarely played: check it earns its slot (48/100)
Pays off your artifact engine (17 producers). Fits the artifact build players run with your commanders. Top-5% staple by play data.

Scrap Trawler3$3.08
In place of Fathom Seer: weakest slot in the deck (49/100)
Pays off your artifact engine (17 producers). Fits the artifact build players run with your commanders. Top-5% staple by play data.

Archmage Emeritus2UU$0.70
In place of Fool's Demise: weakest slot in the deck (50/100)
Pays off your instant-and-sorcery engine (17 producers). Top-5% staple by play data.

Psychosis Crawler5$2.68
In place of Distorting Wake: weakest slot in the deck (51/100)
Pays off your card-draw engine (19 producers). Top-5% staple by play data.

Displacer Kitten3U$34.03
In place of Hoverguard Sweepers: weakest slot in the deck (53/100)
Pays off your enters-the-battlefield engine (10 producers). Pays off your instant-and-sorcery engine (17 producers). Top-5% staple by play data.

Wizard ClassU$2.90
In place of Call to Mind: weakest slot in the deck (53/100)
Pays off your card-draw engine (19 producers). Top-5% staple by play data.

Reflections of Littjara4U$2.87
In place of Rush of Knowledge: weakest slot in the deck (54/100)
Pays off your instant-and-sorcery engine (17 producers). Top-5% staple by play data.
Save a copy to try them. The editor's Improve list has these and more, with the swaps one click each.
Decklist
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Prices are current market estimates, not what the sealed product costs. Magic: The Gathering is © Wizards of the Coast.
