Cheapest priced copy (Kaldheim Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Cultivator of Blades 
Creature — Elf Artificer · 1/1 · Rare · Kaldheim Commander · #55
Fabricate 2 (When this creature enters, put two +1/+1 counters on it or create two 1/1 colorless Servo artifact creature tokens.)
Whenever this creature attacks, you may have other attacking creatures get +X/+X until end of turn, where X is this creature's power.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kaldheim Commander | 55 | Rare | $0.49 | — |
| Kaladesh | 151 | Rare | $0.49 | $0.49 |
| Kaladesh Promos | 151 | Rare | — | $0.79 |
| Kaladesh Promos | 151s | Rare | — | $0.69Out of stock |
6 rulings from Wizards of the Coast
- 20 September 2016The value of X is determined as Cultivator of Blades's last ability resolves. It won't change later, even if its power changes. If Cultivator of Blades is no longer on the battlefield, use its power as it last existed on the battlefield to determine the value of X.
- 20 September 2016If you can't put +1/+1 counters on the creature for any reason as fabricate resolves (for instance, if it's no longer on the battlefield), you just create Servo tokens.
- 20 September 2016You choose whether to put +1/+1 counters on the creature or create Servo tokens as the fabricate ability is resolving. No player may take actions between the time you choose and the time that counters are added or tokens are created.
- 20 September 2016Fabricate doesn't cause the creature with the ability to enter the battlefield with +1/+1 counters already on it. For example, Weaponcraft Enthusiast will enter the battlefield as a 0/1 creature, then its fabricate ability goes on the stack. Players may take actions (such as casting instants) while the ability is waiting to resolve.
- 20 September 2016You choose whether or not to have your other attacking creatures get +X/+X as Cultivator of Blades's triggered ability resolves, not as you put it onto the stack.
- 14 July 2017If this creature's power is negative as its ability resolves, X is considered to be 0.