Just one comment on naming...
It's standard fashion that if a divine spell is created it is named after the deity of the divine spellcaster (NOT the deity of the spellcaster who created it but the caster's deity), whereas an arcane version is named after the wizard (or perhaps sorcerer) who first learned/used it. Thus, adding a little piece of flavor text referring to this would probably be a good idea. (See the PHB, Bigby's Crushing Hand, as an example.)
This might be a real bummer if it was actually "created" by a druid named Logan, but if that's the case then the spell simply wasn't named right.
On the other hand, Logan might just be a nature god in your campaign. In which case it's named just about right, but needs to be clarified as follows:
Level: Drd 3 (Logan), Rgr 2 (Logan), Sor/Wiz 2