Akroan Line Breaker is a uncommon Creature — Human Warrior card from Journey into Nyx (JOU), collector number 88. Current market price: $0.15 (foil $0.37), TCGplayer market prices via Scryfall.
Heroic — Whenever you cast a spell that targets this creature, this creature gets +2/+0 and gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)