Kate Stewart
Legendary Creature — Human Scientist
Whenever you put one or more time counters on a permanent you control, create a 1/1 white Soldier creature token.
Whenever Kate Stewart attacks, you may pay 
. If you do, attacking creatures get +X/+X until end of turn, where X is the number of time counters among permanents you control.
- CMC
- 4
- Mana cost
- Color identity
- RUW
- Rarity
- rare
- Set
- Doctor Who
- Price
- —
- EDHREC rank
- #14570
Kate Stewart enters and immediately starts taxing your opponents' creature-based strategies, turning every Soultether Golem trigger and token producer against the table. The cost is real — she doesn't advance your board on her own — but in The Tenth Doctor // Rose Tyler shells built around historic permanents and enters-the-battlefield value, she's pulling double duty as both disruption and synergy piece.
Best Commanders
Commanders with the highest synergy
The Tenth Doctor // Rose Tyler
The Tenth Doctor // Rose Tyler runs Kate Stewart in over half of all registered lists because she's a historic permanent that triggers off the Doctor's adventure-based engine while simultaneously taxing opponents who go wide — exactly the tempo game that deck wants to play.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Kate Stewart is a Commander card through and through — her political tax effect scales with the number of opponents and the density of creatures hitting the board across multiple decks, both of which Commander delivers in abundance. In Legacy and Vintage she's technically legal but offers nothing competitive formats can't get from more efficient prison pieces. Oathbreaker is the one fringe space where she could see play, again only in a Doctor Who-adjacent build where the historic trigger matters. Outside of 100-card multiplayer, leave her on the shelf.
Key Combos
Combo lines featuring this card
Kate StewartSoultether Golem
Draw the game; Infinite creature tokens; Infinite ETB
View on Commander Spellbook ↗
Kate StewartIntruder AlarmJhoira's Timebug
Infinite ETB; Infinite creature tokens; Infinite mana creatures you control can produce; Infinite untap of creatures; Infinite untap of creatures you control
View on Commander Spellbook ↗
Kate StewartIntruder AlarmHourglass of the LostAphetto Alchemist
Infinite ETB; Infinite creature tokens; Infinite mana creatures you control can produce; Infinite untap of creatures; Infinite untap of creatures you control; Infinite white mana; Infinitely large creatures you control until end of turn
View on Commander Spellbook ↗
Kate StewartIntruder AlarmHourglass of the LostVizier of Tumbling Sands
Infinite creature tokens; Infinite ETB; Infinite mana creatures you control can produce; Infinite untap of creatures; Infinite untap of creatures you control; Infinite white mana; Infinitely large creatures you control until end of turn
View on Commander Spellbook ↗
Kate StewartIntruder AlarmHourglass of the LostIoreth of the Healing House
Infinitely large creatures you control until end of turn; Infinite ETB; Infinite creature tokens; Infinite mana creatures you control can produce; Infinite untap of creatures; Infinite untap of creatures you control; Infinite white mana
View on Commander Spellbook ↗Price Context
Current price
unknown tier
Pricing data for Kate Stewart isn't pinned down at the moment, so check Scryfall or TCGPlayer for the current market. Given her narrow synergy profile — she's primarily a The Tenth Doctor // Rose Tyler card — expect a low ceiling unless Doctor Who Commander demand spikes again.
Explore
Sources
Mentioned
- Soultether Golem
- The Tenth Doctor // Rose Tyler
- Intruder Alarm
- Jhoira's Timebug
- Hourglass of the Lost
- Aphetto Alchemist
- Vizier of Tumbling Sands
- Ioreth of the Healing House
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.