Xavier, Enabler Of Potential

Spells you cast cost {1} less to cast for each {x} in
their mana costs.

Whenever you cast a spell with {x} in its mana cost,
look at cards from the top of your library equal to its
mana value. Reveal up to one Mutant card from
among them and put it into your hand. Put up to
one of of them on top of your library. Put the rest
on the bottom of your library in a random order.

"Krakoa is for all mutants. Welcome home."