for confusion guard, the original spell it came from had it attacking its allied creatures, but it attacking its owner also makes sense. maybe it would be interesting to have it equally likely to do either?
for the nymph, i think we should find some comparable skill costs relative to the spell version of the ability. that is to say the cost of the spell antimatter (8|6) vs the cost of the entropy nymph ability (4|4) to determine the ability costs of mind nymph.