Cheapest priced copy (Phyrexia: All Will Be One): $0.35 at Card Kingdom, near mint, their price list as of .
Ambulatory Edifice 
Artifact Creature — Phyrexian Construct · 3/2 · Uncommon · Phyrexia: All Will Be One · #79
When this creature enters, you may pay 2 life. When you do, target creature gets -1/-1 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Phyrexia: All Will Be One | 79 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 4 February 2023You don't choose a target for Ambulatory Edifice's last ability at the time it triggers. Rather, a second "reflexive" ability triggers when you pay 2 life this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.