Red Beast

Blood Magic: Red Beast (血液魔法『紅いケダモノ』) is a Blood Magic spell.

Description
With an open grimoire, the user expels a large amount of blood and shapes it into the upper body of a large creature with clawed hands, a gaping mouth, and no eyes. It is dense enough to withstand powerful offensive spells, and its claws are sharp enough to tear apart defensive spells and humans. Immersing the beast in large amounts of water will dilute and dissolve it.

Several threads of blood keep the user tethered to the beast, so the user has to remain near the beast when attacking. The attachments can be moved to different parts of the beast, such as the back, which allows the user to ride the beast through the air.