| GrimOceanus |
The interesting shenanigans I was thinking of happen when you have a flying familiar with invisibility. At that point, you have a mobile sphere of entanglement that can potentially ground fliers. Even if you just have it double move around, you can force the Reflex save for all enemies, then next round just do that again to force another Reflex save
If you add Tenebrous to increase the DC, as a dedicated Wizard/Arcanist, you can have an easy DC 16 for a permanently flying torch of entanglement. Not the best use of a 3rd level slot, but hilarious nonetheless.
If you don't want to waste a feat, you can just spend 3k to get a Lesser Rod of Shadow Grasp to apply the metamagic w/o the level increase to a Dust of Twilight for a DC 18+ (if you have spell focus or what not) darkness, fatigue, entangle radius.