
Paradox — Whenever you cast a spell from anywhere other than your hand, put a +1/+1 counter on target creature.
Team TARDIS — At the beginning of your end step, untap each creature you control with a counter on it.
The Thirteenth Doctor is a Simic value engine built around casting spells from exile and graveyards—suspend, foretell, adventure, flashback, cascade, plot, and impulse draw all trigger Paradox to drop +1/+1 counters, while Team TARDIS untaps your counter-laden creatures every end step for repeated attacks, blocks, and ability activations. You ramp early, develop a counter-matters board, and snowball card advantage from alternate-zone casting before closing with an oversized, perpetually-untapping crew. As a Doctor, she's best paired with a companion background to round out the deck's identity and synergy.
Lean hard into alternate-zone casting—load up on suspend, foretell, cascade, and free-spell enablers like As Foretold and Finale of Devastation so Paradox triggers constantly. Add counter doublers (Doubling Season, Branching Evolution) and proliferate to convert incidental counters into lethal threats, plus untap-payoff creatures that exploit Team TARDIS. Round it out with strong Simic ramp and protection (Heroic Intervention, Lightning Greaves) so your engine survives interaction.
Seeded from a single deck — rates appear once more public decks exist.
→ Infinite mana creatures you control with counters on them can produce, Infinite untap of creatures you control with counters on them
→ Infinite card draw, Infinite draw triggers, Near-infinite storm count
→ Infinite card draw, Infinite draw triggers, Near-infinite storm count
→ Infinite card draw, Infinite draw triggers, Near-infinite storm count
→ Infinite card draw, Infinite draw triggers, Near-infinite storm count
Combos via Commander Spellbook.
Same color identity (GU), by popularity.