In the Trenches is a mythic Enchantment card from The Brothers' War (BRO), collector number 301. Current market price: $0.77 (foil $0.84), TCGplayer market prices via Scryfall.
Creatures you control get +1/+1. {5}{W}: Exile target nonland permanent you don't control until this enchantment leaves the battlefield. Activate only as a sorcery and only once.