Cheapest priced copy (Zendikar Rising Commander): $0.99 at Card Kingdom, foil, near mint, their price list as of .
Anowon, the Ruin Thief 
Legendary Creature — Vampire Rogue · 2/4 · Mythic · Secret Lair Drop · #1568
Other Rogues you control get +1/+1.
Whenever one or more Rogues you control deal combat damage to a player, that player mills a card for each 1 damage dealt to them. If the player mills at least one creature card this way, you draw a card. (To mill a card, a player puts the top card of their library into their graveyard.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.99 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secret Lair Drop | 1568 | Mythic | $2.29 | — |
| Secret Lair Drop | 1568★ | Mythic | — | $1.49 |
| Zendikar Rising Commander | 1 | Mythic | — | $0.99 |
| Zendikar Rising Commander | 7 | Mythic | $2.49 | $1.99 |
4 rulings from Wizards of the Coast
- 25 September 2020You draw just one card, no matter how many creature cards the player mills beyond the first.
- 25 September 2020The player dealt combat damage mills cards only for the damage dealt by your Rogues, not for any other combat damage dealt to them at the same time.
- 25 September 2020Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to other Rogues you control may become lethal if Anowon leaves the battlefield during that turn.
- 25 September 2020If Rogues you control deal combat damage to two players at once, Anowon’s ability triggers twice.