Can´t remember seeing any great Scythes in the game? Think best one I have seen
xcpt the generic pitax +4 one from shop is a +2 frost scythe?

Anyone know if there are any hidden awesome Scythes out there?

there is undead bane keen scythe +5 and +5 scythe that heals you 1d4 per hit. nothing amazing.

There are a couple of really good scythes that you get later in the game. Unfortunately they are much later in the game.