Magical gene / no coat effect

Cleansing light

An aura that burns the undead. Zombies, skeletons, drowned and anything else that counts take steady damage while they stand near the horse, out to a radius written on the allele copy.

Built, and not yet seen in game

The gene, its inheritance and its founder table exist and are covered by the test suite; the translator that turns it into behaviour was written against the 26.1.2 sources and is flagged unverified in its own comments. Nothing on this page has been watched happening to a horse. What to look at, and what is most likely to be wrong, is on To be verified.

What it does

Combination	Outcome
`Cln/Cln`	undead within the radius take damage on a slow beat
anything else	nothing

It costs you the drops

This is the important part and it is deliberate. A mob killed by the horse’s aura was not killed by you, so you get no experience and none of the drops that only fall to a player kill. Ride into a group of zombies with this gene and you will win, and you will come away with nothing.

It is a defensive gene, not a farming one. If you want the loot, hit them yourself first.

Health

None to the horse.

Gene key: horsegenetics.cleansing_light
Alleles: Cln cleansing, n
Inheritance: homozygous recessive
Reaches the game as: a healing effect with a negative amount and an undead group
Epigenetic: radius
Coat effect: none, ever

The lost loot is a settled decision, not a defect

Kills are credited to the horse, so no player experience and no player-only drops. This was raised in design and accepted deliberately — the gene is protection, and crediting the rider was rejected as making it straightforwardly better than fighting. Recorded here so a later session does not “fix” it.

Keep the interval at twenty ticks or more

Below about a second, the target’s hurt-immunity frames swallow most of the damage — so a faster beat costs the full entity scan and delivers almost nothing extra. The cheap setting and the correct setting are the same setting here.

The group filter must use entity type tags

Five genes share this filter. A hardcoded list makes every modded creature invisible to all five at once, and the failure is silent — the aura simply never fires on anything from another mod. Build it on tags in the change that introduces it.

A healing aura with the sign flipped

Rather than a new verb, this is healing with a negative amount and a group the verb did not previously offer. That keeps one radius-effect implementation rather than two, and it means the cap discipline every radius effect is required to state is inherited rather than re-argued.

A gene that wins fights and loses value

The loot cost is what stops this being simply the best combat gene. It draws a real line between the horse that keeps you alive and the horse that makes you rich, and forces a choice about which one you are riding today — which is more interesting than an aura that does both.

Magic fighter Healer Holy ward What to check in-game

Planned source: common/genetics/genes/CleansingLightGene.java