I visit here quite a bit but this is my first post so if I fail to meet the standards then my apologies.

Anyway....

Scythes will begin as a 3 star item that can be upgraded all the way up to 5 star and the weapon itself increases in size as you upgrade it. From being as small as a proto sword to the size of a leviathan blade.

Dormant Scythe- 3 star craft: 5 owlite feathers, 3 soul dust, 1 hailstone, 10 dark shards, and 3 sharp fangs.
Awakened Reaper- 4 star craft: 1 Dormant Scythe (lvl5+), 10 soul dust, 2 torchstone, 15 light shards, 1 power cell, and 5 sharp fangs
Grim Sever- 5 star craft: 1 Awakened Reaper (lvl10), 10 philoso feathers, 5 gremlonium, 2 maiden's tear, 5 shadow steel, and 10 dragon scales

When fighting with this weapon it is as slow as the heavy blade lines and as it upgrades it slowly increases in speed but it remains no faster than a calibur. It's status effects aren't as well rounded, it has no buffed attack power against certain enemies. Just normal attack damage against them. (no "vs monster damage" here!)

At 3 star its about as fast as a hatchet, commits average damage of a tempered calibur, when charged it fires a small two explosion burst (kind of like the brandish when you charge up).

At 4 star its speed steps up a little faster than any heavy weapon, on top of average damage of an ascended calibur it can commit a small amount of shadow damage, when charged has a minor chance of causing a curse.

At 5 star its speed steps up to nearly as fast as a calibur, average damage of a leviathan blade and a larger amount of shadow damage, its charge attack has a good chance of causing curse.

That's just my thought on a new sword line...