Thunderous Might - Born of the Gods - 114

Enchantment — Aura

Mana Cost: {1}{R}

Enchant creature
Whenever enchanted creature attacks, it gets +X/+0 until end of turn, where X is your devotion to red. (Each {R} in the mana costs of permanents you control counts toward your devotion to red.)

Uncommon · Born of the Gods · #114 (BNG)

Illustrated by Jaime Jones