Velo Machia, the Lorekeeper

Vigilance, haste
Prowess
Whenever Velo Machia attacks, look at the top
five cards of your library. You may cast an
instant or sorcery spell with mana value less than
or equal to Velo Machia's power from among
them without paying its mana cost. Put the rest
on the bottom of your library in a random order.