Cheapest priced copy (The Lost Caverns of Ixalan Commander): $3.99 at Card Kingdom, near mint, their price list as of .
Cordial Vampire 
Creature — Vampire · 1/1 · Rare · Crimson Vow Commander · #125
Whenever this creature or another creature dies, put a +1/+1 counter on each Vampire you control.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $3.99 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lost Caverns of Ixalan Commander | 189 | Rare | $3.99 | — |
| Modern Horizons | 83 | Rare | $3.99 | $14.99 |
| Crimson Vow Commander | 125 | Rare | $4.49 | — |
2 rulings from Wizards of the Coast
- 14 June 2019If a Vampire you control is dealt lethal damage at the same time as another creature, they die at the same time. That Vampire can't receive a counter from Cordial Vampire's ability in time to save it.
- 14 June 2019If Cordial Vampire dies at the same time as one or more other creatures, its ability triggers for each of them.