Sauce on a comic where a dude summons a succubus but then it turns him into a chick?
>>15689013
Might want to be more specific OP.
>google image result: https://www.google.co.uk/search?q=succubus+tg&rlz=1C1SVED_enGB392GB392&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi_gIGx_pfWAhUqLsAKHfbOBxUQ_AUICigB&biw=1920&bih=974