Battle Mastery
Duel Decks: Heroes vs. Monsters — uncommon
Enchantment — Aura
Enchant creature
Enchanted creature has double strike. (It deals both first-strike and regular combat damage.)
"Boom! Boom! Boots the size of oxcarts, then an axe like a falling sun. Elves scattered. Trees scattered. Even the hills ran for the hills!" —*Clachan Tales*