Siegehorn Ceratops
Creature — Dinosaur
Enrage — Whenever this creature is dealt damage, put two +1/+1 counters on it. (It must survive the damage to get the counters.)
To a siegehorn, there is no such thing as a dead end.
Filip Burburan
Rivals of Ixalan Promos (PRIX)
• #171pRulings
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.
(wotc • 2018-01-19)
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.
(wotc • 2018-01-19)
Rulings
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.
(wotc • 2018-01-19)
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.
(wotc • 2018-01-19)