Arcane Foundry › Commanders › Deekah, Fractal Theorist
Deekah, Fractal Theorist
Legendary Creature — Human Wizard · {4}{U} · Blue commander
Magecraft — Whenever you cast or copy an instant or sorcery spell, create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is that spell's mana value.
{3}{U}: Target creature token can't be blocked this turn.
Build a Deekah, Fractal Theorist deck →
What Deekah, Fractal Theorist actually does
Read off the card by the same engine the Forge and Analyzer use — this is the mechanical classification, not a summary.
- Triggered ability · cast_spellWhenever you cast or copy an instant or sorcery spell, create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is that spell's mana value.
- Activated ability{3}{U}: Target creature token can't be blocked this turn.
What a Deekah, Fractal Theorist deck needs
Plays as spellslinger. What the commander asks of the other 99 — read from the card and checked by hand.
- creatures with combat-damage triggers and big single attackers (it makes one unblockable or evasive on demand)
- instant and sorcery spells (its trigger fires on each one you cast)
- +1/+1 counter producers and payoffs (its text places or reads +1/+1 counters)
- token payoffs — anthems, sacrifice outlets and go-wide finishers (it makes tokens on repeat)
The Deekah, Fractal Theorist deck plan
The roles the Forge fills for this commander, and how many cards of each.
- 22× Instants and sorceries — for a magecraft/prowess commander the spell COUNT is the engine
- 20× A card that is CAST to trigger the commander — reanimating or blinking it does not count
- 14× Put +1/+1 counters on creatures you control, or multiply the ones already there
- 12× Make creature tokens — a static anthem or a go-wide commander needs a board to be wide
- 4× A team pump that actually pumps tokens
- 5× Actually remove one problem permanent — preventing its damage is not removing it
- 9× Find the exact card the plan needs
- 2× Answer a spell or ability before it resolves
- 1× Answer a whole board at once
Best cards for Deekah, Fractal Theorist
Ranked by an engine that reads what each card does — its real cost, its delay and how reliably it works — rather than counting how often other people play it.
Instants and sorceries — for a magecraft/prowess commander the spell COUNT is the engine
- Pact of Negation0 mana
- An Offer You Can't Refuse1 mana
- Brainstorm1 mana
- Mystical Tutor1 mana
- Opt1 mana
- Ponder1 mana
- Pongify1 mana
- Preordain1 mana
A card that is CAST to trigger the commander — reanimating or blinking it does not count
- Pact of Negation0 mana
- An Offer You Can't Refuse1 mana
- Brainstorm1 mana
- Mystical Tutor1 mana
- Opt1 mana
- Ponder1 mana
- Pongify1 mana
- Preordain1 mana
Put +1/+1 counters on creatures you control, or multiply the ones already there
- Thrummingbird2 mana
- Vexing Radgull2 mana
- Kid Loki1 mana
- Dreamtide Whale3 mana
- Flux Channeler3 mana
- Glistening Sphere3 mana
- Walking Ballista0 mana
- Forge of Heroes0 mana
Make creature tokens — a static anthem or a go-wide commander needs a board to be wide
- Kozilek's Unsealing3 mana
- Replicating Ring3 mana
- Omarthis, Ghostfire Initiate0 mana
- Andúril, Flame of the West3 mana
- Field of the Dead0 mana
- Fountainport0 mana
- Phyrexian Triniform9 mana
- Spawnbed Protector7 mana
A team pump that actually pumps tokens
- Heraldic Banner3 mana
- Chief of the Foundry3 mana
- Master of Etherium3 mana
- Caged Sun6 mana
- Favorable Winds2 mana
- Eldrazi Monument5 mana
- Heroes' Podium5 mana
- Endurance Bobblehead3 mana
Actually remove one problem permanent — preventing its damage is not removing it
- Reality Shift2 mana
- Pongify1 mana
- Rapid Hybridization1 mana
- Resculpt2 mana
- Umezawa's Jitte2 mana
- Titan's Presence3 mana
- Icy Prison2 mana
- Kozilek's Command2 mana
Find the exact card the plan needs
- Reshape2 mana
- Mask of the Mimic1 mana
- Long-Term Plans3 mana
- Whir of Invention3 mana
- Merchant Scroll2 mana
- Mystical Tutor1 mana
- Muddle the Mixture2 mana
- Personal Tutor1 mana
Answer a spell or ability before it resolves
- Mindbreak Trap4 mana
- Fierce Guardianship3 mana
- Force of Negation3 mana
- Force of Will5 mana
- Flare of Denial3 mana
- Pact of Negation0 mana
- An Offer You Can't Refuse1 mana
- Arcane Denial2 mana
Answer a whole board at once
- Desynchronization4 mana
- Wave Goodbye4 mana
- Whelming Wave4 mana
- Consuming Tide4 mana
- Selective Obliteration5 mana
- Evacuation5 mana
- Perplexing Test5 mana
- Cyclonic Rift2 mana
Combos with Deekah, Fractal Theorist
Known combos from Commander Spellbook that Deekah, Fractal Theorist is a piece of, and how many decks list them.
- Deekah, Fractal Theorist + Fury Storm559 decks
- Deekah, Fractal Theorist + Chain Of Smog219 decks
- Deekah, Fractal Theorist + Chain Of Acid39 decks
- Deekah, Fractal Theorist + Intruder Alarm + Harmonized Trio14 decks
- Deekah, Fractal Theorist + Will, Scion Of Peace + Phyrexian Altar + Whispers Of The Muse4 decks
- Deekah, Fractal Theorist + Will, Scion Of Peace + Phyrexian Altar + Clockspinning3 decks
Build this deck in the Arcane Forge →
Arcane Foundry is free to join and every tool is included: the Arcane Forge deck builder, the ARCANE Analyzer that scores a deck by simulating games rather than counting staples, a card scanner, a collection vault, and live webcam Commander tables.
Read the guide · Browse all commanders · Pricing