Mythic Beast, Fenrir
By Soul-Blasting, you can add a card with the same grade as the sum of the grades of cards Soul-Blasted for the cost to your hand, and call a card from your hand!
When placed into the drop zone from your soul, call that card! Furthermore, it gets +10000 Power when it attacks!
Utilize Soul-Blasts during battle phase to call cards that have been placed into the drop zone from the soul, and launch continuous attacks!

Mythical Destroyer Beast, Vanargandr
When placed, choose a rear-guard and retire it! If it is a vanguard, retire all rear-guards instead of just one!
At the end of the battle, look at the top three cards of your deck, place one on the top of the deck, one on the bottom of the deck, and the rest into your soul!
Manipulate the deck and aim for trigger effects to be activated!