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Still seems a little on the pricey side for me.
The unupgraded may be okay, but the upgraded is way too expensive relative to the unupgraded.
Remember that upgrading a card is worth about 1 to 2 card cost in and of itself, so I think you would be okay leaving it at 3
... maybe 4
at most.
The only real advantage I see to this card is a slight reduction in effective card numbers in your deck.
Timing is critical in terms of the impact of quanta advantage in a game, so having to wait to build up even 3
is a fairly significant drawback compared to most other quanta sources.
Consider [card immolation]
I think most players would take that card over this one hands down.
The reasons being that
1) Its free
2) Its non-quanta cost is much lower (1 photon or spark for instance... both of which are easy to splash)
3) This card would take about several multiple turns to pay off while immolation is instant
If anything, I would make this card free or maybe 1
as a cost. The HP drain is enough of a balance