Can Eclipse Herald ready multiple times per turn, every time you stun an enemy?

Question

Accepted Answer

Yes — Eclipse Herald can be readied multiple times in a single turn, but only if it becomes Exhausted between those stun triggers. If it is already Ready when a stun-trigger resolves, the Ready instruction does nothing. [415.1.b] [415.1.c] [423.1.a.1]

Each time you legally stun an enemy unit, Eclipse Herald's triggered ability can be placed on the chain and, when it resolves, will attempt to ready Eclipse Herald. If Eclipse Herald is Exhausted at the time the ability resolves, it will be Readied. If it is already Ready when the ability resolves, nothing additional happens and it is not Readied again. Therefore you can have it become Ready multiple times in one turn only if it is Exhausted between those resolution points. [415.1.b] [415.1.c] [423.1.a.1]

You stun an enemy unit; this meets the trigger condition of Eclipse Herald and its triggered ability is placed on the chain. [423.1.a.1] When that trigger resolves it attempts to ready Eclipse Herald and give it +1 Might this turn. If Eclipse Herald is Exhausted at that moment, it becomes Ready. [415.1.b] [415.1.c] Later in the same turn you stun another (legal) enemy unit; that creates another trigger for Eclipse Herald which can be placed on the chain and will resolve separately. [423.1.a.1] If Eclipse Herald is Exhausted at the time the second trigger resolves, it will be Readied again. If it is already Ready when the second trigger resolves, the Ready instruction does nothing. [415.1.b] [415.1.c]

If you attempt to stun the same unit that is already Stunned, that stun may be chosen as a target but it cannot make the unit Stunned again and will not cause Eclipse Herald to trigger for that attempted stun. [423.1.a.1] If multiple stun events happen simultaneously (creating multiple triggers), the triggers will be placed on the chain. As those triggers resolve one at a time, the first to resolve can ready Eclipse Herald; subsequent resolves will only ready it if it became Exhausted again in between resolutions. [415.1.b] [415.1.c] If something prevents the Ready effect from taking place (replacement or continuous effect that forces Exhausted or prevents readying), the Ready instruction will either do nothing or be replaced according to the applicable rules. The core limitation remains: a unit that is already Ready cannot be Readied again. [415.1.b] [415.1.c]

The ability on Eclipse Herald triggers "When you stun an enemy unit, ready me and give me +1 [M] this turn." Each time you legally stun an enemy unit you place that triggered ability on the chain and, when it resolves, it will attempt to ready Eclipse Herald. However, the Ready action has two relevant rules: "A Unit that is already Ready cannot be Readied again" and "If a Unit is instructed to be Readied while it is already Ready, nothing additional happens." [415.1.b] [415.1.c] Additionally, stunned is a binary state and a unit that is already Stunned cannot be Stunned again; the rules even use Eclipse Herald as the example for that point. [423.1.a.1] Put together: multiple separate stun events can each trigger Eclipse Herald's ability, but those triggers only have an effect on the Ready state if Eclipse Herald is Exhausted at the time each trigger resolves. If Eclipse Herald is already Ready when one of those triggers resolves, the instruction to Ready it does nothing. Therefore, you can have Eclipse Herald be readied multiple times in one turn only if it becomes Exhausted between those trigger resolutions. [415.1.b] [415.1.c] [423.1.a.1]