Once you complete all the available levels in Toon Blast, you get to be eligible to enter the Master's League. The Master's League is a collection of challenging levels (or Phases) that will test your wits and your skill at solving puzzles. 

Clearing multiple puzzles in a row will grant you a win streak, and each level of the streak will contain helpful items you can use to clear a puzzle. Be careful, however, as losing a puzzle will reset your streak and miss out on these items.

You’ll be placed in a league with other users and whoever collects more Phase wins by passing levels will get amazing rewards. Prizes will be based on the time you enter the League. The earlier you join the League, the better the prizes will be. Each League season lasts until new levels are out.

If you can survive the Master's League, you will be placed in the ultimate challenge: The Champion's League! This league functions like the Master's League, except the puzzles will be harder, the challenge greater, and it will push your wits to the limit!