npc_heroes_custom.txt

"DOTAHeroes"
{
    //=====================================================
    // HERO: Sniper
    //=====================================================
    "npc_dota_hero_sniper_datadriven"
    {
        "override_hero"         "npc_dota_hero_sniper"
        "Ability1"              "sniper_shrapnel_datadriven"
        "Ability3"              "sniper_take_aim_datadriven"
    }
}