That's the Armament way  

1.5x HP & 2x ATK for Devil Type; 1.5x ATK when Dark & Fire attack at once

Min Turns 0
Max Turns 0
Levels 0
Single Pair
HP 1.5x 2.25x
Attack 3.0x 9.0x
RCV 1.0x 1.0x
Shield 0% 0%