Ocean Monument

Ocean Monument is the easiest devastating master track, it is available in the event bosscraft, it has 80 rounds where you fight every freeplay bloon. At round 80, you fight the elder guardian blimp.

Rules:

 * 80 rounds
 * Only water towers
 * Checkpoint every 8 rounds
 * Sandbox is allowed
 * Extract the treasure before round 80

Rewards
Every difficulty: 1M exp