A portal opens and the skulls pour out. The weakspots are how you close it. A mega portal is the same idea, bigger. Leave it up and the horde does not stop.
Product goal
A portal is the source, not another elite. Killing skulls spends the crowd. Breaking the portal stops the supply. The weakspots give you a target in the middle of the swarm. Which rounds open them lives on the level.
As built
Elite enemies
These are the non-swarm enemies and the boss that exist in the project now.
During a life the player can meet skullworms, quadrupeds, Orobas, scorpions, portals and their weakspots, mega portals, and the Skull Squid boss. Each has a definition and a pool factory in as-built assets. Portals bring more enemies. Weakspots are how a portal is broken. The boss runs projectile patterns from BossPatternDefinition assets.
What ends it
An elite dies, a portal collapses, or the boss pattern ends. All of them unload with the gameplay scope. Kinds that are not in those assets are not spawned.
What is saved
Nothing per creature. A quest step can credit a boss id or a family, and that quest lifetime is saved with the profile.