吠えるイージサウルス
クリーチャー — 恐竜
激昂 ― 吠えるイージサウルスがダメージを受けるたび、あなたがコントロールしていてこれでない各クリーチャーの上にそれぞれ＋１/＋１カウンター１個を置く。
その咆哮の最後に尾が大地を打つ音が響くと、周囲の群れはみな熱り立った。
Illustrated by
The Lost Caverns of Ixalan Commander#127UncommonJapaneseLegality
Rulings
If another creature you control is dealt lethal damage at the same time that Bellowing Aegisaur is dealt damage, the other creature won't be saved by the +1/+1 counter that would have been put on it.
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.
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.