Blood Minion

A shape comprised of blood is called forth on a point within range. 

The minion is friendly to you and your companions for the duration. Roll initiative for the minion, which has its own turns. It obeys any verbal commands that you issue to it (no action required by you). If you don't issue any commands to the minion, it defends itself from hostile creatures but otherwise takes no actions.

If your concentration is broken, the minion doesn't disappear. Instead, you lose control of the minion, it becomes hostile toward you and your companions, and it might attack. An uncontrolled minion can't be dismissed by you, and it disappears 1 hour after you summoned it.

The minions statistics are that of a water elemental with the following changes: The minion cannot speak any languages but understands all languages you speak, it has immunity to necrotic damage, and its Slam and Whelm attacks deals necrotic damage. Undead, plants, and constructs cannot be hit by the minions attacks.