Banner-Waving Harbinger

Trample, Lifelink, Teleport (Whenever this creature would die, you may pay two life. If you
do, you may put it into The Realm.)
As this creature enters the battlefield, choose a creature type.
Creatures of the chosen type cost {2} less to cast.

At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.