Coldsteel Conglomerate

Coldsteel Conglomerate enters the battlefield tapped.
Amalgamate-- Exile target artifact card you control. Put X +1+1 counters on Coldsteel Conglomerate, where X is that card's converted mana cost. Coldsteel Conglomerate has all activated abilities of all the cards exiled with it.
It stalks the Gixis highlands, waiting for a master only it can sense.