Cheapest priced copy (Mirrodin Besieged): $0.79 at Card Kingdom, near mint, their price list as of .
Phyrexian Vatmother 
Creature — Phyrexian Horror · 4/5 · Rare · The List · #MBS-52
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
At the beginning of your upkeep, you get a poison counter.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.79 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin Besieged | 52 | Rare | $0.79 | $2.99 |
| The List | MBS-52 | Rare | $0.79 | — |