This card fits really well with Egg-type cards and Khadgar, just imagine a 4/5 yeti being turned into 4 on turn 5 (turn 4: Yeti. Turn 5: Khadgar + Conjurer's Calling). I do think it's strong with Khadgar but most often than not I also see it being as a 1-time thing since your opponent would very likely kill khadgar. It also looks pretty good without the shenanigans..