Cheapest priced copy (Foundations Jumpstart): $0.69 at Card Kingdom, near mint, their price list as of .
Priest of Gix 
Creature — Phyrexian Human Cleric Minion · 2/1 · Uncommon · Urza's Saga · #150
When this creature enters, add {B}{B}{B}.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.69 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Phyrexia vs. the Coalition | 7 | Uncommon | $0.99 | — |
| Foundations Jumpstart | 121 | Uncommon | $0.69 | — |
| The List | DDE-7 | Uncommon | $0.99 | — |
| Urza's Saga | 150 | Uncommon | $3.49 | — |
2 rulings from Wizards of the Coast
- 25 January 2011You get the mana whether you want it or not. If you don't spend it, it will disappear at the end of the current step (or phase).
- 25 January 2011The triggered ability isn't a mana ability. It uses the stack and can be responded to.