Blood Well

Form blood, within a 60ft from the casting point, into a single mass. The blood well's volume increases by 2ft cubed for every 50gp of blood used.
The well can be a floating sphere or cube, or it can fill a container.

The well sucks in any blood within 60ft of it at a rate of 50gp / round.

The blood in the well can be taken for other spells, but every 50gp taken makes the wall smaller by 2ft cubed. If another creature takes the blood using a spell they must make a skill check using their spellcasting modifier (against your spell save). You can be willing.