Intense concentration

Through practice and study, you've gained the ability to expend great effort to maintain 2 concentration spells simultaneously. Under the following conditions:

• The spells you concentrate on cannot share any spell tags.
• You must take a bonus action and spend a spell slot equal to half (rounded down) the spell level of the lowest level spell you are concentrating on every other round to maintain concentration (Minimum of a level one spell slot). Failure to do this will end the spell of your choice.
• If you are concentrating on 2 spells and take damage, roll 2 concentration saves. If one fails, you lose concentration on the spell of your choice. If you fail both, you lose both spells. 
• Both spells still have the same costs, components and cast times for their initial casting.