Concentration
Isn't this spell concentration? It doesn't say in the page.
Turns out it isn't a concentration spell in this game. Good buff.
Spellcasting modifier for damage
I believe this to be wrong. I think it SHOULD do that. But both the entry for the weapon created itself says it uses STRENGTH modifier and in-game I tested it on my Druid and it always seems to benefit from Strength (dump stat) rather than his Wisdom.