Lagiacrus

Prowess (Whenever you cast a noncreature spell,
this creature gets +1/+1 until end of turn.)
When Lagiacrus attacks, you may look at the top X
cards of your library, where X is Lagiacrus' power.
You may put a card from among them into your
hand, and another into your graveyard. If a card
was placed into the graveyard this way, deal
damage equal to its mana cost to target creature and inflict them with Thunderblight.