We've released some new logic to handle things such as the regeneration of health, spirit health, fatigue, etc.
Some of the effects you will notice:
1. Spirit health regenerates faster, in preparation for some overall changes to the amount of spirit health creatures and players have.
2. Creatures will regenerate health similar to players.
3. Creature bleeding has been fixed. Whether something bleeds or not is no longer based on whether it has fewer than 4 legs.
4. Creature balance above solid will decay towards solid faster. The decay rate is not as fast as players to help offset differences in attack speed.
-- GM Veyl