Jyacorder

The Jacorder (ジャコーダー) is an item that is inserted into Sagarc to evoke the transformation into Saga. In battle, it has two modes, the rapier-like Rod Mode (ロッドモード) and the whip-like Bute Mode (ビュートモード). After using the Wake Up Fuestle, Saga turns day into crescent moon night as he executes his Snaking Death-Break (スネーキングデスブレイク) attack with the destructive power of the Jacorder's two modes, piercing the target with Rod Mode before jumping through the Kiva insignia formed in midair to hang the target using the Bute Mode until it is destroyed. As the new Dark Kiva, Taiga continues to use the Jacorder as a weapon.

The Sagarc Belt and Jacorder appear to be based on Kamen Rider X's henshin belt/main weapon, the Ridol.