I suggest to make that mystery cost 40 chakra or to give it a 2 rounds starting cd or to remove one of the two effects it grants (or only immunity since that moment onwards or only debuff removal, not both).

With the current metas that mystery is objectively too strong.

Yes, i know what SB supporters would say: 'but can be interrupted!' or 'but can be removed with buff removal mysteries!' but in concrete both of those options are wholly unviable for the largest part of the teams that make use of them due to how the battle mechanics actually work and due to its interaction with Genjutsu - Mirror Returning.