There are 3 pre-level boosters:

Minefield - Adds 3-4 mines at the start of the level. When hit it destroys the surrounding marbles.

 

 

Rainbow rush - On impact turns balls in area of effect the same color. Has to be manually activated

 

Chakra charge - increases chakra fill speed by 10%

 

 

Pre-level Boosters can be selected before level, one of each maximum.