Leash

As additional cost to cast this spell, reveal any
number of legendary creatures from your hand.
Seach your library for X land cards, reveal those
cards, and put them into your hand, where X is
the number of legendary creatures revealded.
Then shuffle one of those creatures into your
library. Draw a card.
The forest where the Rift resides was the site of several
magic battles that has mutated the local wildlife.