Cheapest priced copy (New Capenna Commander): $6.49 at Card Kingdom, near mint, their price list as of .
Mari, the Killing Quill 
Legendary Creature — Vampire Assassin · 3/2 · Rare · Outlaws of Thunder Junction Commander · #138
Whenever a creature an opponent controls dies, exile it with a hit counter on it.
Assassins, Mercenaries, and Rogues you control have deathtouch and "Whenever this creature deals combat damage to a player, you may remove a hit counter from a card that player owns in exile. If you do, draw a card and create two Treasure tokens."
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $6.49 to $9.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Capenna Commander | 89 | Rare | $6.49 | $9.99 |
| New Capenna Commander | 97 | Rare | $7.99 | $8.99 |
| Outlaws of Thunder Junction Commander | 138 | Rare | $6.49 | — |