Each of the games elemental effects (fire, freezing etc.) in addition to the other mechanics (shock, stealth) are wrapped into the bonus effects of Modifiers.
In this guide I'll show you an easy way to farm for purple Modifications from the beginning of the game, setting you up for the game's tougher machine fights. As you probably know, Horizon Zero Dawn's best items are classified into the Very Rare category, signified by a deep purple colour. Modifications in Horizon Zero Dawn provide players with a means to upgrade weapons and armour by applying bonus traits to their base stats.