Concentrate

-spell for yet unmade homebrew class, "anomaly"-

Using you anomalous energy you attempt to gain control of a magical effect upon you causing it to rely on your concentration rather than the casters

As an action, you can attempt to gain control of a spell effect currently upon you which requires concentration. When cast, the spell effect no longer relies on the original casters concentration and instead relies upon your own.
If the caster is willing to give you control, the effect is immediate. If the caster is unwilling to give control they must make a Constitution saving throw against your spell save DC and you gain control on a failure. If the target spell's level is greater than the level you cast this spell at, the target gains a bonus to the save equal to the difference in levels. If you cast this spell at a level greater than the target spells level then the target suffers a penalty to the save equal to the difference.
Upon gaining control of the spell you can immediately dispel it as a free action if you wish.
The max duration of the spell after you gain control, is equal to the current remaining duration before you gained control and if the spell in question, effects other targets than yourself, the effects on any other targets still depend on the concentration of the caster rather than you.