Guys guys guys. This card is not OP, and it is not useless.
^Explantion to this:
This card basically acts as a seperate pillar, with the upped producing an extra quanta of your mark (which should justify the cost of 2
, you are paying 2/3 (yes,two thirds) quanta to produce potententially up to 5 extra quanta). It's pretty clear this card is meant for multiquanta support, as indicated by the series name "Quantum Mechanics".
Oldtrees comment shows the purpose of this card.
A big reason (if not the only valid reason) for including new forms of quanta generation is to support more decks structures. Harmonic pillar does that by promoting the use of regular pillars in many element decks for consistent many color decks. Previously those decks would have had to rely (and fail) on quantum pillars.
In fact, if this was to be introduced, it would make a
great substitute to those useless quantum towers in starter decks.