Turret

A Turret, also called a Tower, is a heavy fortification that blocks the enemy's minion waves and champions' path to the Nexus. In order for a Champion to push forward and continue its assault into the enemies’ territory, the champion must destroy these turrets. Charging minions will not be able to pass any further up a lane until the turret closest to them is destroyed. Turrets do heavy damage to enemy units.

Attack Prioritization
Turrets will continue to attack their current target until the target dies, leaves attack range, or becomes untargetable due to abilities or items.

If an enemy champion within range deals damage to an allied champion (including via damage over time or a pet), the turret will change targets to that enemy champion unless the turret is already targeting another enemy champion.

When the current target is lost for whatever reason, the turret will select a new target—whichever of the following, in order, is found in range first:
 * 1) The closest targetable Trap (i.e., heimer's mechanical turrets).
 * 2) The closest enemy Pet (i.e., , , , , , , , or ).
 * 3) The closest enemy Siege Minion, Promoted Minion, or Super Minion.
 * 4) The closest enemy Melee Minion.
 * 5) The closest enemy Caster Minion.
 * 6) The closest enemy Champion.

Damage
Turrets do more damage with each successive hit against a champion, starting at 105%, then to 125%, 150%, 175%, 200%, and up to a maximum of 225% on the sixth hit and beyond.

Turrets have 30% armor penetration, and deal 80% damage to siege minions and super minions.

Abilities that deal bonus damage to turrets

 * Attack modifiers
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE
 * AoE

Abilities that are affected when attacking the turret
These abilities are affected when attacking the turret but do not deal extra damage:
 * Stacking effect


 * Heal

Abilities that do not deal bonus damage to turrets

 * and

It should be noted, however, that some of these abilities reset the champion's autoattack animation, and while the ability itself does not deal bonus damage to the turret, activating it right after an attack will allow for a double strike, taking the turret down faster.

Abilities that are not affected when attacking turrets
No stacking effect No heal No proc

Turret Stats (Summoner's Rift)
(* Estimated values )

(** That can be checked only on spectator mode as Nexus Obelisk is untargetable while playing)