|This article is about a/an transformation equipment in Kamen Rider Build.|
Killbuspider (キルバスパイダー Kirubasupaidā) is the transformation device of Kamen Rider Killbus. It was originally the Spider-Type Pet Robot (蜘蛛型ペットロボット Kumo-gata Petto Robotto), a spider-like toy developed by Sento Kiryu for Ryuga Banjo to sell in an effort to make a profit. However it was modified by Killbus for use in the Build Driver along with the Killbus Spider Fullbottle.
To transform, Killbus first inserts the Killbus Spider Fullbottle into the Killbuspider and folds the legs up. He then inserts the Killbuspider into the Build Driver and cranking the Vortex Lever.
By cranking the Vortex Lever again, Killbus can perform the Killbus Spider Finish (キルバススパイダーフィニッシュ Kirubasu Supaidā Finisshu), which has three variations:
- Killbus dashes around the enemy while binding them with webbing so that they cannot move before he strikes them with his gigantic four spider legs, exploding the enemy in process.
- Killbus binding his enemy with webbing so that they cannot move before his gigantic four spider legs slowly moves toward them, exploding the enemy in process.
- Killbus attaches strands of webbing to the enemy and throws them into the air before delivering a spinning heel kick.