"Well too much of anything generally isn't good," Lea said. "And Ethers have some other things in them too, besides water; different kinds of plant extracts and things that are mixed together in a certain way and then chilled. But in this case, it's less about the water and more about taking something that gives you a sudden boost of magical energy to let you artificially extend your limits. It's like with spells or healing potions that heal you physically; it works well, and it's fine in the short term, but eventually, you have to stop and rest and let your body actually recover. You can't just keep chugging potions in lieu of actually taking care of yourself, ya know?"