Cheapest priced copy (Warhammer 40,000 Commander): $7.49 at Card Kingdom, near mint, their price list as of .
Biotransference 
Enchantment · Rare · Warhammer 40,000 Commander · #30
Creatures you control are artifacts in addition to their other types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.
Whenever you cast an artifact spell, you lose 1 life and create a 2/2 black Necron Warrior artifact creature token.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $7.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Warhammer 40,000 Commander | 30 | Rare | $7.49 | — |
| Warhammer 40,000 Commander | 30★ | Rare | — | — |
One ruling from Wizards of the Coast
- 7 October 2022Replacement effects that modify artifacts as they enter the battlefield will apply after you apply Biotransference's effect. For example, if you control a Biotransference and there is an effect that says artifacts enter the battlefield tapped, creatures you control will enter the battlefield tapped.