Cheapest priced copy (Fifth Dawn): $3.49 at Card Kingdom, near mint, their price list as of .
Mephidross Vampire 
Creature — Vampire · 3/4 · Rare · Special Guests · #4
Flying
Each creature you control is a Vampire in addition to its other creature types and has "Whenever this creature deals damage to a creature, put a +1/+1 counter on this creature."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $2.49 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 53 | Rare | $3.49 | $6.99 |
| Special Guests | 4 | Rare | $4.49 | $2.49Out of stock |
One ruling from Wizards of the Coast
- 1 December 2004The triggered ability Mephidross Vampire grants to each creature you control triggers on any damage dealt to any creature, not just combat damage.