It is trash, complete one. Nobody plays it. Even in demons composition it is not played. It is pure crap, you cannot have two in the board because there is no effect. Golden is also crap. I just had game against 3 demons (two felbats) and won easily with boars. Demons are bad because this is pure trash buffer.
Right now I feel like getting the right trinkets dictate what you are playing. I had the Felbat portrait and Felblood portrait. This made for some huge minions in the tavern which by the end was cleaned out 4 times every turn. I won with 500/500 minions across the board. Even though I feel the Fellbat could indeed prob be T5. Demons could use some love.