Good card and art!
Maybe somehow hard to implement since there isn't atm anything in the system to select a certain quantum type/slot in mana pool.
Just one thing about the lore of the card... FMA let's u think alchemy is about equivalent exchange.
In reality it was more gnoseologic than phisycal: the lead that become gold is actually the man and is mind that get to a superior and mystical state (that of a golden man). The philosopher's stone had also to be a panacea (meaning it could heal all the ill thoughts, and give knowledge about how to heal the physical ones) and the long life elixir (cause a man of gold is remembered forever)... but actually alchemist sometimes drank quicksilver or gave it to drink to their king... causing the opposite effect of a long life elixir.