Quote Originally Posted by Shurrikhan View Post
There are. On BLM alone there are arguably... 4. Fire IV and Blizzard IV can't be simultaneously used, and can only be used after Enochian, for which key there is no use after having initiated Enochian (at least until somehow failing to maintain it). Between the Ley Lines can only be used after Ley Lines has been set, and there are no further uses for the latter's key after its initial press.
Blizzard 2 has no use once Freeze is learned, same with Fire 2 and Flare.