Cheapest priced copy (Rivals of Ixalan): $0.35 at Card Kingdom, near mint, their price list as of .
Imperial Ceratops 
Creature — Dinosaur · 3/5 · Uncommon · Rivals of Ixalan · #10
Enrage — Whenever this creature is dealt damage, you gain 2 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Rivals of Ixalan | 10 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 19 January 2018If lethal damage is dealt to a creature with an enrage ability, that ability triggers. The creature with that enrage ability leaves the battlefield before that ability resolves, so it won’t be affected by the resolving ability.
- 19 January 2018If multiple sources deal damage to a creature with an enrage ability at the same time, most likely because multiple creatures blocked that creature, the enrage ability triggers only once.
- 19 January 2018If your life total is brought to 0 or less at the same time that Imperial Ceratops is dealt damage, you lose the game before its enrage ability resolves.