Ymondf

0.2.7
The shard and cannon mechanics for the full moon phase, and the moon phase order has also been changed back to the natural cycle.

Moon phases: New Moon → First Quarter → Full Moon → Last Quarter
Health    Phase    What you see
100% – 75%    New Moon    Almost entirely dark; only earthshine reveals the sphere's outline
75% – 50%    First Quarter    Half-lit, right side illuminated
50% – 25%    Full Moon    Brightest, largest
25% – 0%    Last Quarter    Half-dark, slowly extinguishing
The opening is the new moon with the deepest seal; as health drops it grows brighter, reaching its peak at the full moon, and finally darkening. The battle music also switches in the order New Moon → First Quarter → Full Moon → Last Quarter.

Moon Phase Disc Shards
During the full moon phase, killing summoned mobs no longer deducts the moon's health; instead, one "Moon Phase Disc Shard" drops.

Two Moon Phase Cannons
During the full moon phase, two cannons fall on the east side of the arena—positioned with their backs to the moon. When entering the last quarter, the two cannons automatically explode and are destroyed.

Right-click the cannon body while holding a shard to load it; the muzzle lights up, and it fires automatically after about one second
The beam hits the moon, deducting 5% health and making the moon flash
After each shot there is a 5-second cooldown
During this phase only the cannons can damage the moon, so the rhythm is "kill monsters to stockpile shards → load the cannon → wait for cooldown"