I like the idea of having obscure interaction that is also very flavorful. But flavorly speaking, it does not make sense to me (well, more than a spark or a photon being a creature, I guess) that this was made a creature. Originally I thought it was a permanent similar to pillar/pendulum or the latest quanta generator, Soul Catcher. Maybe a name change is in order? (But that would remove the flavor aspect so I can see the dilemma there, sigh)
Second, the quanta generation is a bit much in my opinion, fractal these (kinda hard not to imagine anything made
broken better with that cursed card) and suddenly your darkness quanta will bloat up so much to fuel your Siphon Life which is definitely not cool in my opinion. at least with Fractal-Pest your opponent needs to have quanta for you to steal, this only require Eclipse for 2x
each and that is much easier to achieve. I'd say reduce the quanta generation to just 1
.
and change the text on the last line to read :-
: Target creature has 50% evasion.