Cheapest priced copy (Secret Lair Drop): $14.99 at Card Kingdom, near mint, their price list as of .
Polyraptor 
Creature — Dinosaur · 5/5 · Mythic · Rivals of Ixalan · #144
Enrage — Whenever this creature is dealt damage, create a token that's a copy of this creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $14.99 to $39.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Rivals of Ixalan Promos | 144s | Mythic | — | $22.99 |
| Rivals of Ixalan | 144 | Mythic | $16.99 | $24.99 |
| Secret Lair Drop (Indominus Rex) | 1391 | Mythic | $39.99Out of stock | — |
| Secret Lair Drop (Indominus Rex) | 1391★ | Mythic | — | $32.99 |
| Secret Lair Drop | 2194 | Mythic | $14.99 | $14.99 |
| Special Guests | 12 | Mythic | $20.99 | $17.99 |
5 rulings from Wizards of the Coast
- 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 Polyraptor leaves the battlefield before its triggered ability resolves, most likely because it was dealt lethal damage, the token will still enter the battlefield as a copy of Polyraptor, using Polyraptor's copiable values from when it was last on the battlefield.
- 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 2018The token won't copy counters or damage marked on Polyraptor, nor will it copy other effects that have changed Polyraptor's power, toughness, types, color, or so on. Normally, this means the token will simply be a Polyraptor. But if any copy effects have affected that Polyraptor, they're taken into account.
- 19 January 2018The token will have Polyraptor's ability. It will also be able to create copies of itself.