Корни в том числе и у доты в классических рпг, там это устроено примерно так :
 * AOE Area of Effect. The area affected by an attack/spell/etc which affects more than one creature or object. (Воздействие по области)
 * AoO (Attack of Opportunity) Special attacks that a character can make as a reaction to some game event or Character / NPC action. (Атака непосредственного противника)
 * Called Shot An attack made by a character which targets a particular area on an opponent or object. Depending on the system a called shot will trade off increased difficulty for increased damage and/or an additional effect.
 * DOT (Damage Over Time) (Урон за время)
 * Buff (Enforce, усиление, дар, орбы)
 * Debuff (Обратное buff)

##  И на все это влияют:
* LoE - Line of Effect. (Зона воздействия)
* LoS - Line of Sight. (Зона видимости)