Implacable

Luke Skywalker‘s ability does not prevent the use of Implacable’s ability, as the ship equipped with Implacable is spending its own shields to reduce the damage total before damage is suffered.

Reference

If a friendly ship or squadron at distance 1-2, before it suffers damage from an attack, a ship equipped with Implacable, you may exhaust Implacable.

If you do, Implacable can spend up to 2 shields on its front hull zone to reduce the total damage by that amount.

This reduction shares the same timing as Brace. Meaning the defender can choose which is resolved first. However there is no apparent benefit in applying Implacable until after Brace.

Implacable is able to choose itself as a target. For example, if the ship was attacked in the rear hull zone, you could choose to resolve Implacable and suffer up to 2 damage on the front zone.

If one of your squadrons is attacked by “Dutch” Vander or an Exogorth, if Implacable is able to prevent that squadron from “suffering” any damage, than their effects would not resolve, as that squadron did not “suffer” damage.

Implacable is only able to be used on damage that is from “attacks”, not on any damage that is not from an “attack”. Such as obstacle damage, mines, or Cluster Bombs, etc, as these are not attacks.

Implacable is able to be used on friendly unarmed stations in Station Assault.