Cheapest priced copy (Commander 2020): $0.49 at Card Kingdom, near mint, their price list as of .
Boneyard Mycodrax 
Creature — Fungus · */* · Rare · Commander 2020 · #40
Boneyard Mycodrax's power and toughness are each equal to the number of other creature cards in your graveyard.
Scavenge {4}{B} ({4}{B}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2020 | 40 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 17 April 2020The ability that defines Boneyard Mycodrax’s power and toughness works in all zones, not just on the battlefield.
- 17 April 2020The number of counters given by Boneyard Mycodrax’s scavenge ability is its power as it last existed in your graveyard before exiling it. Players can’t change how many counters it gives out after you’ve activated the ability by changing what’s in your graveyard.