Cheapest priced copy (Double Masters): $0.49 at Card Kingdom, near mint, their price list as of .
Cragganwick Cremator 
Creature — Giant Shaman · 5/4 · Rare · The List · #SHM-87
When this creature enters, discard a card at random. If you discard a creature card this way, this creature deals damage equal to that card's power to target player or planeswalker.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 122 | Rare | $0.49 | $0.49 |
| The List | SHM-87 | Rare | $0.49 | — |
| Shadowmoor | 87 | Rare | $0.49 | $4.99 |
4 rulings from Wizards of the Coast
- 7 August 2020You choose the target player or planeswalker when the ability is put onto the stack. You won't know how much damage will be dealt until the ability resolves.
- 7 August 2020Cragganwick Cremator deals damage equal to the discarded creature card's power as it exists in your graveyard.
- 7 August 2020If you have no cards in hand when Cragganwick Cremator's ability resolves, you don't discard anything.
- 7 August 2020If the target player or planeswalker is an illegal target by the time the ability tries to resolve, the ability won't resolve. You won't discard a card.