Yolraeth, Fleshwrithe

Hexproof
{2}{u/b}{u/b}: Discard a creature card and Yolraeth, Fleshwrithe get +X/+X where X is the discarded cards converted mana cost.
{p/b}{p/u}: Regenerate Yolraeth, Fleshwrithe and it loses Hexproof until end of the turn.