Cheapest priced copy (Commander 2021): $0.49 at Card Kingdom, near mint, their price list as of .
Ruin Grinder 
Artifact Creature — Construct · 7/4 · Rare · Final Fantasy Commander · #297
Menace
When this creature dies, each player may discard their hand and draw seven cards.
Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2021 | 57 | Rare | $0.49 | — |
| Commander 2021 | 384 | Rare | $0.99 | — |
| Final Fantasy Commander | 297 | Rare | $0.49 | $0.79 |
| The List | C21-57 | Rare | $0.49 | — |
One ruling from Wizards of the Coast
- 16 April 2021Players decide and announce in turn order, starting with the active player, whether or not they want to discard their hand. Then, all players who chose to do so discard their hands and draw seven cards. Players later in the turn order will know if players before them are discarding, but they don't get to see what those players will discard to help them decide whether to discard themselves.