Cheapest priced copy (Commander 2020): $4.99 at Card Kingdom, near mint, their price list as of .
Sawtusk Demolisher 
Creature — Beast · 6/6 · Rare · Commander 2020 · #64
Mutate {3}{G} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Trample
Whenever this creature mutates, destroy target noncreature permanent. Its controller creates a 3/3 green Beast creature token.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2020 | 64 | Rare | $4.99 | — |
One ruling from Wizards of the Coast
- 17 April 2020If the target noncreature permanent is an illegal target by the time Sawtusk Demolisher’s last ability tries to resolve, the ability won’t resolve. No player will create a Beast token. If the target is legal but not destroyed (most likely because it has indestructible), its controller does create a Beast token.