Orbital Decay (Gravity): When raging, light seems to bend around rune form, the area around their head becomes black and white, and gravity seems to have more of a pull for everyone in the room (including allies). Enemies within 15 feet seem to be pulled toward rune and suffer disadvantage on attacks against creatures other than rune.

Temporal Morass (Time): When raging, light flickering with blue and red after-images, and the timing of their movements become erratic. The target must make a Constitution saving throw to avoid having their speed halved and losing their reactions.

"Space": When raging, rune's head becomes "less there" and their brain becomes slightly transparent underneath the glass. When  a melee attack on turn, they can open a portal to a space within 60 feet of him that he can see and attack a creature as though he were in that space.

"Possibility": When raging, the head flashes with rainbow sparks. Each ally within 15 feet of him can add a d4 to attack rolls and saving throws.