Hirubiran

Hirubiran appeared in 1980 TV series called Kamen Rider (Skyrider). Hirubiran (ヒルビラン Hirubiran) is a leech monster.

He was the leader for a guerilla tank assault operation using a lethal Varimithium shell that literally evaporate cities at the blink of an eye. The operation was delayed however as Neo-shocker engineer Izumida sabotaged the Varimithium firing mechanism out of guilt and went in hiding to find his daughter. Hirubiran then needed to kidnap both and later execute them. Destroyed in a tank explosion by 8 Riders' attack - including Skyrider's Big Revolving Sky Kick.

Powers and Abilities
He can turn into a tiny leech and in humanoid form can throw said leeches as bombs. The leeches also excrete hot acid that can easily melt flesh.