Arakni, Web of Deceit

Arakni’s first ability generates a static-continuous effect that is applied to your attacks with stealth that are attacking a marked hero. Those affected attacks will get both the power increase and the “on-hit” triggered static ability as long as they are attacking a marked hero. If they are no longer attacking a marked hero, they will no longer have those aforementioned effects.

Marked heroes are no longer marked after they are hit and damage is dealt to them in the damage step. This means stealth attacks that are attacking a marked hero will continue to have the +1 and the “on-hit” triggered-static ability as long as the defending hero is marked when damage calculation begins. The hit event occurs which will simultaneously trigger that on-hit ability granted to the attack from Arakni and will remove the marked condition from the defending hero.

Arakni’s second ability triggers at the beginning of your end phase. Whether an opponent is marked is checked when this triggered effect resolves. When this triggered effect resolves, you become a random Agent of Chaos. There is no priority for any players during the end phase of a turn.