A damage-doubling creature is almost always viable, and he is pretty close to being on par in mana without considering how strong his ability is
It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or any Auras or Equipment attached to it, or any non-copy effects that have changed its types, color, power and toughness, and so on
Building a deck, regardless of energy type, is a trial and error process that takes a deeper understanding of Pokmon to be the most effective
Ante on top of a broken effect doesnt make for a fun or exciting card, and this black sorcery looks like more of a blemish on Magic history than anything else
DUSKMOURN COMMANDER: BLACK Ancient Cellarspawn is the kind of card that has me wondering about Legacy
I forget what Option card I was using, but I think Dark Lord's Cape got negated again