A face-down spell or permanent has no creature types, so you cannot use Cavern of Souls (please remember to link all cards) to make it uncounterable.
July 31, 2014 11:38 p.m.
The Creature card type and 2/2 P/T are the only characteristics a face-down creature has. No name, no color, no creature type, nothing else.
July 31, 2014 11:39 p.m.
Thanks. Sorry about that. I just spaced naming Cavern of Souls .
So what you're saying is a "Morph tribal deck". would be hard.
July 31, 2014 11:52 p.m.
It would be weird. Some possible build-around cards include Dermoplasm , Ixidor, Reality Sculptor , Ixidron , Master of the Veil , Weaver of Lies , Skirk Alarmist , Dream Chisel , Mentor of the Meek , Goblin Tunneler , and Raid Bombardment .
August 1, 2014 12:13 a.m.
I was thinking Ixidor, Reality Sculptor as the general in EDH.