Secondary Phase – Conditional Behavior System for Mobs

Summary

This proposal introduces a system called Secondary Phase, where mobs (including NPCs like villagers) can gain alternate behaviors when certain conditions are met. These may include low health, weather changes, time of day, or contextual triggers (such as witnessing the death of a baby mob).

Importantly, this phase is not guaranteed to occur every time. When conditions are met, there's a chance for the mob to enter its Secondary Phase — making it a rare and dynamic moment rather than a predictable one.

Concept

The Secondary Phase is an optional behavioral state that may be triggered by:

• Health falling below a specific threshold (e.g., 50%)

• Environmental changes (e.g., night, thunderstorm)

• Context-based events (e.g., death of a nearby baby animal)

Even when these conditions are met, entering the Secondary Phase is not guaranteed — it depends on probability. This encourages players to stay alert and adapt without making encounters repetitive.

When triggered, the mob may change visually, audibly, or behaviorally. Effects may include:

• Visual or sound changes (e.g., glowing eyes, louder noises)

• Temporary buffs or new behaviors

• Increased mobility or defenses

• Smarter fleeing, panicking, or retaliation

Examples

• Zombies run faster, break blocks

• Spiders shoot webs

• Ghasts fire multiple fireballs

• Husks kick up dust clouds to blind

• Turtles retreat into shell, reflect damage

• Horses perform back kicks

• Strays apply Freezing effect

• Chickens run faster, glide with wing flaps

• Phantoms dive through blocks