I just played a game and my opponent drew and summoned the card " Clockwork Assistant " after playing Kazakusan.
It seems like spells are not working on it.
Firstly I used the paladin card “Righteous Defense” and it gave the stats to my minion, however, the Clockwork Assistant remains with 15/15 ( according to the description Righteous Defense should set the minions stats to 1/1.
I’ve even tried using the card " Equality " which was supposed to set all minions health to 1 and Clockwork Assistant still remained with the same stats 15/15.
I have a link to the replay and screenshot, but it is not allowing me to share it.
It is, “Has +1/+1 for each spell you’ve cast this game.”
This isn’t a Battlecry, but an Aura. Auras are reapplied after stat changes, similar to Stormwind Champion.