Cheapest priced copy (Commander Masters): $0.49 at Card Kingdom, near mint, their price list as of .
Experiment Kraj 
Legendary Creature — Ooze Mutant · 4/6 · Rare · Commander Masters · #337
Experiment Kraj has all activated abilities of each other creature with a +1/+1 counter on it.
{T}: Put a +1/+1 counter on target creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $0.49 to $17.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 337 | Rare | $0.49 | $0.99 |
| Commander Masters | 578 | Rare | — | — |
| Dissension | 110 | Rare | $0.69 | $17.99 |
| RNA Guild Kit | 117 | Rare | $0.69 | — |
2 rulings from Wizards of the Coast
- 1 May 2006Unlike with cards like Quicksilver Elemental, the costs of the activated abilities Experiment Kraj gains must be paid with the correct colors of mana.
- 8 June 2016Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.