Raptors are clever enough to tear away a hard metal shell to get at the tasty morsel inside.

Ripjaw Raptor

Enrage — Whenever this creature is dealt damage, draw a card.

The Lost Caverns of Ixalan Commander

Enrage — Whenever Ripjaw Raptor is dealt damage, draw a card.

Game Night 2019

Ixalan

Ixalan Promos

If 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.

If 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.