Ehh...self-mill might be going a bit overboard. It's still a continuous spell card like any other, and can be blown off the field with a plethora of effects. It's also contradictory to the legend the card is representing (the Horai Elixir cures all illnesses, grants eternal life, and even has the power to revive the dead, though the last use is excluded from the card for obvious reasons; milling yourself seems more like shortening your lifespan than lengthening it) not to mention that if we want to talk crazy setup potential, Lightsworn is drooling at that notion. Free Wulf/Necro Gardna/Plaguespreader/Lumina target dump? Free raising of the Lightsworn count to set up Judgment Dragon and assurance that you'll have the LP you need to use its effect? Umm...yeah. Crumbling Tower wouldn't particularly appreciate having such a card in their lineup anyway, as drawing into any specific card is precisely the weakpoint of that archetype. I know; it took me ten freaking turns of stall to dig into the Lightning Vortex I needed to seal my game. :x