Devouer with a base HP of 4|6 is powerful (as you noted in your cost estimates).
5[atk]+0[hp]+5[devour4]-1[duo cost]-1[activation cost = 2]=8
7[atk]+1[hp]+7[devour6]-1[duo cost]-1[activation cost = 2]-2[upgrade]=11
Perhaps 4 hp on the upgraded instead?
5[atk]+0[hp]+5[devouer4]-1[duo cost]-1[activation cost = 2]=8
7[atk]+0[hp]+5[devouer4]-1[duo cost]-1[activation cost = 2]-2[upgrade]=8
All in all, I do not think we need another Devour card.
I made the upped 11
. Im spreading abilities in this set, some new devour creatures, a destroy, a rage, and growth. if people like these I will finish out the set, if not, i will wait a few days, and try something else. if people like a set and i get them filled out, ill make nice art for them and submit to crucible, other wise, ill move on. I like doing collections of cards.
We dont need a new devour card, i just think some variety, some new creatures with some good abilities would be good, dinosaur and ancient beasts n such.