Seems far too powerful for an element that gets so many perks for quanta. I know Death has Soul Catcher which does something similar, but what is the difference between 20 and 200 Death quanta? Practically nothing.
It would still be an unbalancing boost to early game which for the ubiquitous fire rush is all important. That would be especially true for the golem rush with the chance of earth quanta being generated. We are talking about being as good as ten pillars if each player plays a card per turn. More against Arena and FG which can often due quite a bit more. Especially against Hourglass users. Against FGs like Osiris 1 card could be generating 50 quanta per turn!
I admit I like fire. Like everyone else it seems I have a fire deck for Arena play, but this seems to try to maintain the unbalanced monopoloy of Fire. Don't believe it? Look at the Leaderboards in Arena and count the Fire Marks in top 25. If you see an Earth Mark in there, pretty good chance it is a Lava Rush deck too.
Fire needs to diversify a little. Not everything has to be rush to kill and destroy. Roast some marshmallows; make some friends before the other Elemental kick it out of the clubhouse for being a bully.