Using an invite ID WILL NOT get you a killer rare (as many people claim). It WILL get you some gold coins, and some pact tokens (silver I believe, which COULD award you a rare or epic familiar, but most likely common and uncommon). The player who owns the invite ID used will get a minotaur.
That being said, if you would like to help an honest player who is lvl 138+ and active all day, please use
INVITE CODE: aLm1G
Also, feel free to communicate with me in game through my board. username is graviton818