Activate only during damage calculation when the ATK of your battling monster is lower than the ATK of your opponent''s, and pay Life Points equal to the difference in ATK. Your monster gains ATK equal to that difference +300, during damage calculation only.
![Prideful Roar (BP01-EN100) [Battle Pack: Epic Dawn]](http://fafnirshoard.ca/cdn/shop/files/59224_06e6fefb-09e3-4234-857e-d956f201dc4f.jpg?v=1782782782&width=1445)