Cheapest priced copy (Ikoria: Lair of Behemoths): $2.99 at Card Kingdom, near mint, their price list as of .
Quartzwood Crasher 
Creature — Dinosaur Beast · 6/6 · Rare · The Lost Caverns of Ixalan Commander · #281
Trample
Whenever one or more creatures you control with trample deal combat damage to a player, create an X/X green Dinosaur Beast creature token with trample, where X is the amount of damage those creatures dealt to that player.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $2.99 to $10.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ikoria: Lair of Behemoths | 201 | Rare | $2.99 | $3.99 |
| Ikoria: Lair of Behemoths | 341 | Rare | $5.49 | $10.99 |
| The Lost Caverns of Ixalan Commander | 281 | Rare | $2.99 | — |
| Ikoria: Lair of Behemoths Promos | 201p | Rare | $2.99 | $5.99 |
| Ikoria: Lair of Behemoths Promos | 201s | Rare | — | $3.99 |
2 rulings from Wizards of the Coast
- 17 April 2020Quartzwood Crasher's second ability includes damage dealt by Quartzwood Crasher itself as long as it still has trample.
- 17 April 2020If a creature you control with trample is unblocked, the full amount of combat damage it deals to the defending player is counted by Quartzwood Crasher's last ability.