Cheapest priced copy (Innistrad: Crimson Vow): $0.49 at Card Kingdom, near mint, their price list as of .
Bloodvial Purveyor 
Creature — Vampire · 5/6 · Rare · Innistrad: Crimson Vow · #98
Flying, trample
Whenever an opponent casts a spell, that player creates a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")
Whenever this creature attacks, it gets +1/+0 until end of turn for each Blood token defending player controls.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 365 | Rare | $0.59 | $2.99 |
| Innistrad: Crimson Vow Promos | 98s | Rare | — | $1.29 |
| Innistrad: Crimson Vow | 98 | Rare | $0.49 | $0.49 |
| Innistrad: Crimson Vow | 290 | Rare | $0.49 | $0.99 |
4 rulings from Wizards of the Coast
- 19 November 2021Only Blood tokens controlled by the player Bloodvial Purveyor is attacking or the controller of the planeswalker it's attacking are counted to determine the bonus from its last ability.
- 24 January 2025If an effect refers to a Blood token, it means any artifact token with the subtype Blood, even if it has gained other subtypes.
- 24 January 2025You can't sacrifice a Blood token to pay multiple costs.
- 24 January 2025Some triggered abilities trigger "whenever you sacrifice a Blood token." These abilities trigger regardless of why you sacrificed that Blood token.