Metal-to-metal annulus wellhead style seal with pressure energized from above and below

A method of sealing a wellhead, comprising:

• positioning, in a first position in the wellhead and between the wellhead and a hanger, a circumferential metal ring having an area between two sides, the area to receive an energizing element, the circumferential metal ring to comprise at least one slit on at least one of the two sides, the slit to change a stiffness of the circumferential metal ring;
• energizing the circumferential metal ring using the energizing element to achieve a second position, in the wellhead, for the circumferential metal ring, the energizing to cause at least one movable portion enabled by the slit to form a first seal between the wellhead and the hanger;
• and
• allowing fluid from a lower area of the wellhead to cause the at least one movable portion to extend towards a wall of the wellhead, the at least one movable portion to form a second seal between the wellhead and the hanger.