Crimson Genesis

You transform a large quantity of blood into a powerful guardian creature. At a point you choose within range, the blood rises up and takes the form of a Large crimson elemental that lasts for the duration.

The guardian is friendly to you and your companions. It has the statistics of an earth elemental with these changes:

     It has immunity to necrotic damage instead of poison damage

     It understands the languages you speak

     Its slam attacks deal an additional 1d8 necrotic damage

     It has the “Blood Surge” ability: As a bonus action, the guardian can sacrifice 10 hit points to regain one use of its Slam attack if it has already used both attacks in a turn

The guardian obeys your verbal commands (no action required). If you don’t issue any, it defends itself and you but takes no other actions.

Blood Sacrifice. When casting this spell, you take 5d4 damage as your blood forms the guardian. If a willing donor provides the blood, they take this damage instead.

At Higher Levels. When you cast this spell using a 7th level spell slot, the guardian’s hit points increase by 30 and its slam damage increases by 1d8. At 8th level, its hit points increase by 60 and its slam damage increases by 2d8. At 9th level, its hit points increase by 90 and its slam damage increases by 3d8.