Nameless Beast
Under the Ash Mountains #95 (x2)
Enemy
(30) 3 3 3 6

Forced: When Nameless Beast attacks you, discard the top card of your deck. Nameless Beast gets +XAttack for this attack, where X is that card's cost.

Shadow: Attacking enemy gets +XAttack where X is the cost of the top card of your discard pile.