Gao Xue, Presence of Time

Prowess (every time a noncreature spell is played,
put a +1/+1 counter on this creature until end of
turn.)
in the beginning of your upkeep draw five cards
and put any amount into your graveyard or the
bottom of your library. Gao Xue gets a +X/+X
counter depending to the combined mana cost of
creatures discarded in the graveyard. if cards are
discarded in the bottom Gao Xue gains any static
ability you choose X turns.