Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.99 at Card Kingdom, near mint, their price list as of .
Dire Fleet Ravager 
Creature — Orc Pirate Wizard · 4/4 · Mythic · Ixalan · #104
Menace, deathtouch
When this creature enters, each player loses a third of their life, rounded up.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.99 to $8.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 749 | Mythic | $0.99 | — |
| The Lost Caverns of Ixalan Commander | 192 | Mythic | $0.99 | — |
| Outlaws of Thunder Junction Commander | 132 | Mythic | $0.99 | — |
| Ixalan Promos | 104s | Mythic | — | $8.49 |
| Ixalan | 104 | Mythic | $0.99 | $2.99 |
3 rulings from Wizards of the Coast
- 29 September 2017For example, if you have 13 life, you'll lose 5 life.
- 29 September 2017If a player has 1 life, that player loses 1 life. If each player has 0 life after that, the game's a draw.
- 29 September 2017In a Two-Headed Giant game, each player loses a third of the team's life total rounded up. For example, if a team has 13 life, each player on that team loses 5 life and the team loses 10 life total.