Commit the changes

An unwilling target has to make Wisdom saving throw DC 13

The spell makes permanent any magical effects and conditions on target. If some of conditions are caused by spell above 4th level, it is required to elevate "Commit the changes" level to same level in order to influence all the effects. Any effects/conditions created by spellcasters no longer require conentration from them and can not be removed at will.

This means that "Commit the changes" at 4th lvl makes permanent all affects of 0, 1, 2, 3, 4 lvl spells applied to the target. This effect can be removed by remove curse or dispell magic in 4 + 1d4 days adding 1d4 days per spell level above 4.

Scaling

Spell level increases the level of influenced effects/conditions

Spell level increaces wisdom DC by 1 per each level above 4

Spell level increaces material component costs by 1d4 platinum coin per level above 4

Spell level increases number of targets by 1 per each level above 4

Note: so for example you can cast it at 5th level to affect two targets and commit 0-5lvl effects to them with wis DC 14, but you'll have to use following materials: 1d8 gold per each effect on each target, one mirror, 1d4 platinum. Material components are consumed even if target saving throw is successfull

Note#2: to be specific, coins just disappear and a mirror gets broken or twisted, it is almost like something can be seen in the remains. Keeping the frame and replacing the mirror is not advised. Something happens to the frame as well, detect magic spell will react to it. Accumulating this effect in the mirror frame is not advised the outcome is unpredictable. Same effect can be achieved by keeping multiple used mirrors in one place.