Mogg Sentry
{R}
Creature — Goblin Warrior
Oracle Text
Whenever an opponent casts a spell, this creature gets +2/+2 until end of turn.
Watch Out
Cast trigger fires even if counteredWatch Out
This triggers when the spell is cast, before it resolves. Even if the spell is countered, the cast trigger still resolves. Copies of spells are not cast, so they won't trigger this.