Bagrox, Prodigy of Simic

Hexproof
Whenever another creature under your control gets a +1/+1 counter, put twice that many +1/+1 counter on Bagrox,Prodigy of Simic.
{1}{u}{g}: Remove X +1/+1 counter from Bagrox, Prodigy of Simic. Draw that many cards.
"I never thought that nature needed any improovement, until they improved me.