I'm sure that this is news to no one but me (especially because it's literally written on her cards), but I hadn't realized that if you can give Unity an off-turn card play (through Argent Adept or any other means), she can play her Mechanical Golems!
Handy little interaction - suddenly giving Unity a card play outside of her turn is super good.
As long as it isn't Unity's play phase on her turn they can played from her hand.
You cracked the code!
Ohhh yes, Unity loves anyone who lets her do stuff out of turn :D. I've mentioend it before, but an epic hero-combo we got out once was TLT, Adept, and Unity (in that order). So TLT let everyone draw loads of stuff, then I (as the Adept) managed to get out Inventive Preparation and an appropriate instrument to play its Accompany on my first or second turn and started using it on Unity at every chance I got, which meant Unity, in turn, basically ended up drawing a whole load of bots and then getting them into play and proceeded to totally wreck whomever it was we were up against in a fairly short amount of time :D.
My fav is with Omni-X, deck attaching or not.