Once a prowess ability triggers, causing the creature to lose prowess by removing Bria from the battlefield won’t affect that ability. The creature will still get +1/+1 until end of turn.
2024-07-26
Bria’s last ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Other creatures you control have prowess. (If a creature has multiple instances of prowess, each triggers separately.)
Whenever you cast a noncreature spell, target creature you control can't be blocked this turn.
