Lifesaving Shovel

UL 21-6 is the final stage in UL 21. 498 and 499 are introduced in this stage.

Battleground

 * At the start of the battle, 400 499s spawn, delay 8~12 seconds.
 * After 3.3 seconds100f, 498 spawns as the boss.
 * After 5 seconds, 8 499s spawn, delay 2~4 seconds.
 * After 26.7 seconds800f, 3 Rain Ds. spawn, delay 80 seconds.

Reference

 * https://cdn.discordapp.com/attachments/603673188336926721/664404782844346390/unknown.png