Cheapest priced copy (The List): $0.49 at Card Kingdom, near mint, their price list as of .
Treeshaker Chimera 
Creature — Chimera · 8/5 · Rare · The List · #NCC-318
All creatures able to block this creature do so.
When this creature dies, draw three cards.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $0.59 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Capenna Commander | 318 | Rare | $0.59 | — |
| The List | NCC-318 | Rare | $0.49 | — |
| Theros Beyond Death | 297 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 24 January 2020If a creature can't block Treeshaker Chimera for any reason (such as being tapped), then it doesn't block. If there's a cost associated with having it block, the player isn't forced to pay that cost, so it doesn't have to block in that case either. If there's a cost associated with having it block Treeshaker Chimera, but not to block other attacking creatures, that creature is free to block one of those other creatures or to not block at all.
- 24 January 2020If a creature is required to block two or more different creatures, its controller chooses which one that creature blocks.