I also love Bigby's hand. Interposing Hand in particular has got me out of a few sticky situations. There are quite a few strong contenders for my favorite spell, but I'll have to go with Wall of Force. This one spell has saved my entire party from multiple TPKs, and I consider it the Holy Grail of defensive spells. But while I'm here, I'd like to shout out a few underrated runner-ups. Vortex Warp is a relatively unknown spell, but I've gotten a surprising amount of mileage out of it. Another spell I never see get talked about is an upcasted Bestow Curse. Its selling point is the chance to completely shut down a single opponent, and when it is upcasted, you don't even to use your concentration for it. It's one of the spells that I love having in my back pocket as an emergency.