Creeper

You channel your entire life force into a single explosion.

All creatures within 5 feet of you must make a Dexterity Saving Throw or take Force damage equal to your remaining hit points. (Half damage if they fail.)

Your hit points are reduced to zero and you are incapacitated

 At higher levels, the damage multiplies and range increases at the rate listed below.

• 1st level: 1x, 5ft.
• 2nd level: 1.5x, 10ft.
• 3rd level: 2x, 15ft.
• 4th level: 2.5x, 20ft.
• 5th level: 3x, 25ft.
• 6th level: 3.5x, 30ft.
• 7th level: 4x, 35ft.
• 8th level: 4.5x, 40ft.
• 9th level: 5x, 45ft.