Cheapest priced copy (The Lost Caverns of Ixalan Commander): $0.59 at Card Kingdom, near mint, their price list as of .
Glass-Cast Heart 
Artifact · Rare · Crimson Vow Commander · #18
Whenever one or more Vampires you control attack, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")
{B}, {T}, Pay 1 life: Create a 1/1 white and black Vampire creature token with lifelink.
{B}{B}, {T}, Sacrifice this artifact and thirteen Blood tokens: Each opponent loses 13 life and you gain 13 life.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.59 to $1.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lost Caverns of Ixalan Commander | 199 | Rare | $0.59 | — |
| Crimson Vow Commander | 18 | Rare | $0.69 | — |
| Crimson Vow Commander | 56 | Rare | $1.29 | — |
3 rulings from Wizards of the Coast
- 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.
- 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.