1. Modify creature 2442 (normal cow) and set the faction to 32.

2. Go to the table eventai_scripts and add a new entry, I used this data:

id: 9006734

creature_id: 2442

event_type: 4

event_chance: 100

action1_type: 1

action1_param1: -5621

comment: cow event on aggro

event_type 4 means, that the event is triggered by drawing aggro from a player. The action type basically says that the action is declared as “saying”, and the param refers to an entry in eventai_texts.

I created this one:

entry: -5621

content_default: Moooooooh. Don’t attack the cow!

And for the whole thing to be working, edit the creature template of entry 2442 and add mob_eventai to the field “Script name”.