name=Battle Mastery
image=https://magiccards.info/scans/en/dtk/7.jpg
value=2.600
rarity=U
type=Enchantment
subtype=Aura
cost={2}{W}
ability=Enchant creature;\
        Enchanted creature has double strike.
timing=aura
enchant=first strike,pos creature
oracle=Enchant creature\nEnchanted creature has double strike.
