Hal, Rejected Protector

At the beginning of your end step, if you both
own and control Hal, Rejected Protector and a
creature named Alena, Slayer of Lycanthropes,
exile them, then meld them into Hal and Alena.
First strike, Vigilance, Reach
Whenever Hal attacks, Look at the top four cards
of your library, then put a legendary creature
card from among them into your hand. Put the
rest into your graveyard.