Sicklekind

Sicklekind is Karkat Vantas's Strife Specibus. Sickles have a small handle, with a medium sized curved blade.

Sickle
Karkat likes to think he looks really really cool practicing in his room with it, but actually he looks kind of a doofus. The most lethal members of Troll society, the threshecutioners (of which Karkat is an aspiring member), are also known to use sickles.

Homes Smell Ya Later
Karkat combined his sickle with The Thresh Prince of Bel-Air DVD to produce Homes Smell Ya Later upon entering the medium. The name is a direct reference to a line in the Fresh Prince of Bel-Air theme, which is actually "Yo holmes, smell ya' later!" In The Thresh Prince of Bel-Air, Troll Will Smith plays a new cadet amongst the ranks of the threshecutioners, sassin' up all the bluebloods in his flaysquad.

Regisickle
It would seem that HS 004213 (later), Karkat also combined his sickle with a Regisword, producing some sort of Regisickle. The weapon is only seen once.

Crab Sickle
This fourth sickle, resembling a large red crab's claw, later joins Karkat's arsenal as he travels across his land with Jack and Terezi.