Bloodrend

Target a creature or humanoid you can see within sight and you can cast this spell coursing the creature to make a constitution  saving throw equal to your DC save. On a failed save target will loose 2d10 Hit points, and the caster will get that as temporary hit points. The target is also under the control of the caster for 1 minute, as the caster is in control of the blood that courses through the targets body.  On a successful save the target will only take half of 2d10 hit points and the target is not controlled, caster will also not get the 2d10 temporary hit points. While the caster is in control, they can do the following as a bonus action.

1.  Bonus action make the target attack there fellow companions

2. Use a bonus action to have the target make another constitution saving throw allowing the caster to get 2d10 more Temporary hit points and the target loses 2d10 hit points.

Use an Action Allowing the DM to roll a percentage die, (DM decides the percentage and does not have to tell you what it is) on a successful roll the targets blood boils causing the target to explode in to pieces, causing instant death. On a failed roll the spell ends.