Game Manager Handy:
Handy's block checker is a game where the team who checks the most blocks in the arena within the 5-minute time limit wins.
When you enter the game, you automatically change into the Block Checker's shape! If you hit the blocks with the block checker's hammer...
Boom! The blocks' colors change! The team with the most checked blocks -- blocks whose color has been changed -- wins!
When the game begins, all current supplemental magic will be automatically removed! No new supplement magic can be cast, even if the game ends.