If exists a wiki page called “Trails” rename it as “Trails and Enemies”, update every occurrence of the old name in the Ruleset and split the wiki page in two sections, “Trails” and “Enemies”
In Rule Trails Replace:

As a weekly action, an Ant who is Above Ground and who has at least 1 Food by spending 1 food may search the surroundings by rolling DICEX, where X is 5 plus the amount of existing Trails. If the result is 3 or less, they succeed, and may create a new Trail. If the result is 4 or 5, they get lost and lose 1 additional Food. If the result is greater than 5, they find a resource that has already been discovered, and nothing happens.

With:

As a weekly action, an Ant who is Above Ground and who has at least 2 Food by spending 1 Food may search the surroundings by rolling DICEX, where X is 6 plus the amount of existing Trails. If the result is 3 or less, they succeed, and may create a new Trail. If the result is 4 or 5, they get lost and lose 1 additional Food, in that case they can perform this action one more time this week after the day after. If the result is greater than 5, they meet an Enemy and shall thus create it (see Enemies).

Create a new rule “Enemies”

An Enemy is a NPC with given Health and Strength to be fought by the Ants. They may have special abilities. They are not listed in the GNDT but in the section “Enemies” of the wiki page “[[Trails and Enemies]]”. The Ant that discovers the Enemy shall create it.
When an Ant shall create a new Enemy they shall do as follow:
To find the distance of the Enemy from the colony roll DICEY where Y is the number of living Enemies plus the number of Corpse Trails.
To find what Species of Enemy the Ant will meet they must roll DICE10.
- on 1 or 2 they meet another Enemy ant, with Health 15, Strength 8. Enemy ants shall be considered Enemies and not Ants.
- on 3 or 4 a Spider with Health 15 and Strength 10.
- on 5 a Scorpion with Health 20 and Strength 15.
- on 6 a Centipede with Health 25 and Strength 12.
- on 7 a Snail with Health 30 and Strength 9;
- on 8 a Little Newborn Mouse with Health 40 and Strength 13;
- on 9 a Ladybird that flies away, and they feel so lucky in having seen such a terrible and blood thirsty animal (and having survived to tell the story) that they get 1 Food and 2 Health.
- on 10 they get squeezed by a Larger Animal and die.
Larger Animals and Ladybirds are not Enemies.
Eventually they shall give it a Name, containing the Species name (eg. Johnny the Enemy ant for an Enemy ant).
Every alive Enemy must be listed on the wiki page with Name, Strength, Health, list of Fighters and discover date/time.
The Ant that found an Enemy shall begin to fight it without paying any food.

Add a new rule, “Combat”:

If an Enemy has been found less than 48 hours before (2 days) any Soldier or Worker wich is AboveGround may start Fighting it by spending its distance from the colony in Food. They shall write their name in the Enemy Fighters list in the wiki and change their location to Fighting.
48 hours after the discovery any Ant may Resolve the Fight. They shall roll DICEZ, where Z is twice the enemy’s Strength minus the number of Ants in the fight*, for every Ant involved and subtract the result from each Ant’s Health. Then they must roll a DICE6 for every Ant involved, sum the results together and add 5 for every Soldier involved. If the result is bigger than the Creature’s Healt the Creature dies, if not it flees. In both cases they shall remove the Enemy from the list. They shall add 10 CP to every survived Ant if the Enemy dies or 5 if it flees, and they may add up to 4 CP to themselves.
If the Enemy died they shall create a new Corpse Trail with the same name of the Enemy. It shall have the same Distance as the Enemy and Size equal to the Enemy’s health divided by 5 plus the number of dead Ants in that Fight. Corpse Trails are like Filling Trails under any aspect, but the Ants that are in Fighting location but not listed in any Enemy on the wiki can follow the Trail created with their last Fight for free, if it exists. They shall then change their location to AboveGround.
Ants in Fighting location may not use any action described in the Dynastic Rules except Resolving a Fight and Following a Trail, but only in the way described in this Rule, and they may leave to AboveGround, if they are not listed as Fighting in the wiki page.
*: Z=2*(enemystrength-antsnumber)