K'balia of a Thousand Heads

Spells you cast and abilities you activate with {x} in their mana cost cost {4} less to cast.
Whenever you cast a spell or activate an ability
with X in it's mana cost, choose one-
•Double the amount of X.
•Make a token copy of it if it's a permanent. If it's
an instant, sorcery, or ability, copy the spell or
ability and you may choose new targets for the
copy.