To make room for these, lets take out Karazikar, the Eye Tyrant, Shiny Impetus, Loyal Apprentice, and Death Tyrant
(I would like to think that Unsubstantiate for only spells would be common because it's very much worse than multiple uncommons.) Meanwhile, Comply is also unique, but it certainly isn't rare, considering that Silence costs the same amount of mana and keeps an opponent from casting anything for a turn, while Comply requires you to "guess the right card" for it to have any effectand even if you guess right, it only stops one card
Which brings us to the next point
The sooner you can get Gadget Hackwrench, Brilliant Boson in play, the better , since it will reduce the cost of all your Inventor characters and allow you to out-value the opponent on the board
Either way, what we have is either a product as it was initially designed before being split into two for some reason, or one that wasn't meant to be smashed together and isn't going to be all that fun to play with
Unfortunately, when we see this effect completely absent of an upfront power boost, it hasnt really played super well