Cheapest priced copy (Special Guests): $20.99 at Card Kingdom, near mint, their price list as of .
Pathbreaker Ibex 
Creature — Goat · 3/3 · Mythic · Special Guests · #91
Whenever this creature attacks, creatures you control gain trample and get +X/+X until end of turn, where X is the greatest power among creatures you control.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
5 printings · $20.99 to $54.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2015 | 38 | Rare | $22.99 | — |
| Commander Anthology | 132 | Rare | $21.99 | — |
| Secret Lair Drop | 307 | Rare | $24.99 | — |
| Special Guests | 91 | Mythic | $20.99 | $24.99 |
| Special Guests | 101 | Mythic | — | $54.99 |
2 rulings from Wizards of the Coast
- 14 July 2017If this creature's power is negative as its ability resolves, X is considered to be 0.
- 7 February 2025If the greatest power among creatures you control is negative as this creature’s ability resolves, X is considered to be 0.