Harald's Horn

When Harald's Horn enters the battlefield, put
the top five cards of your library into your
graveyard. You may return an Elf, Warrior, or
Tyvar card from your graveyard to your hand.
Elf, Warrior, and Tyvar cards cost {1} less to cast.
At the beginning of your upkeep, look at the top
card of your library. If it's an Elf, Warrior, or
Tyvar card, you may reveal it and put it into
your hand.