Powerful. (Maybe OP?)
OP?
It can be easily killed and its kinda hard to get more than 30 quanta ( 6 hp stolen).
No, no it really isn't hard to get that much
quanta. And 5 hp is not that easy to kill either.
At present there is already a fairly strong deck archetype (fractal devourers) that relies almost entirely on drain life spells to kill the other player. Making drain life on a stick could be problematic.