
The JSON config layout for both the 1.21.1 neo and 1.20.1 forge versions.

2x Iron Golem (Mob Stacker, health combined) vs. Zombie with buffs (Sophisticated Storage). Snow Golems fell, but the 2x Golem slayed the Zombie. Rather than sustain permanent damage, the Golem can heal and return to duty thanks to True Healing.

A image showing the different game rules, all prefixed with 'trueheal'

This is how the effect looks in Jade.