Oh my bad, I never ran purify in my deck (just seemed a bit too lacking for general purpose use to slow down my decks by including it, but seems more essential now with these scorpions), and I stopped playing for a while. Before, if I recall correctly, purify did not heal at all, it just fixed poison (before these new cards like fractal and aflatoxin were introduced). Currently it costs water quanta though, so perhaps it should go back to being generic but still keep the 2+ healing.