This cube was first drafted at the CubeCon Bar Cube evening. Feedback there centered on the following:
lifegain is very strong
recursion is very strong
cantrips are weak
fogs are weak
Hellspark Elemental is also permanently banned for (a) being too good and (b) enabling a strategy of running just it, Simian Spirit Guide, and 13 mountains and winning every game where the two cards can be found by a mull to be.