First printed in Dissension (2006)
All 4 prints
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Commander Masters (CMM) #337, 2023
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Commander Masters (CMM) #578, 2023
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RNA Guild Kit (GK2) #117, 2019
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Dissension (DIS) #110, 2006
Experiment Kraj 
Legendary Creature — Ooze Mutant
Experiment Kraj has all activated abilities of each other creature with a +1/+1 counter on it.
: Put a +1/+1 counter on target creature.
MTGO price: 0.006 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
Combos
106 combos from Commander Spellbook, the most popular first.
- Infinite mana legendary creatures you control can produce, Infinite untap of legendary creatures you control: Experiment Kraj + Ioreth of the Healing House
- Infinite mana lands you control can produce, Infinite +1/+1 counters on creatures you control: Experiment Kraj + Horseshoe Crab + Incubation Druid
- Infinite proliferate: Experiment Kraj + Gilder Bairn + Incubation Druid
- Infinite mana lands you control can produce, Infinite +1/+1 counters on creatures you control: Experiment Kraj + Incubation Druid + Simic Ragworm
- Infinite green mana, Infinite proliferate: Experiment Kraj + Gilder Bairn + Gyre Sage
- Infinite colored mana, Infinite proliferate: Experiment Kraj + Gilder Bairn + Kami of Whispered Hopes
- Infinite colored mana, Infinite +1/+1 counters on creatures you control: Devoted Druid + Experiment Kraj + Kami of Whispered Hopes
- Infinite proliferate for permanents: Biomancer's Familiar + Experiment Kraj + Gilder Bairn (+ 1 other requirement)
- Infinite green mana, Infinite +1/+1 counters on creatures you control: Devoted Druid + Experiment Kraj + Hardened Scales
- Infinite green mana, Infinite proliferate: Experiment Kraj + Gilder Bairn + Viridian Joiner
Legality
Constructed
- Standard Not legal
- Pioneer Not legal
- Modern Legal
- Legacy Legal
- Vintage Legal
- Pauper Not legal
- Future Standard Not legal
- Historic Not legal
- Timeless Not legal
- Alchemy Not legal
- Penny Dreadful Legal
- Premodern Not legal
- Old School 93/94 Not legal
Singleton
- Gladiator Not legal
Commander formats
- Commander Legal
- Duel Commander Legal
- Pauper Commander Not legal
- PreDH Legal
- Tiny Leaders Not legal
- Oathbreaker Legal
- Brawl Not legal
- Standard Brawl Not legal
- Competitive Brawl Not legal