RAW you can only use one. I think that's actually the right way to go as action points can become really really powerful.There is restriction that you can use only one action point per encounter. What if power give you an action point? Like Archer's Glory (Battlefield Archer paragon path). It's state you gain 1 action point you need to use before the end of your next turn.
But this power doesn't tell you to use multiple AP.So you can use multiple AP, if an power tells you to..
Nonsense. The term "must" does not mean that you ultimately have to regardless of any other conditions. It just means under reasonable circumstances you are required to or suffer a penalty. The implicit penalty in this case being unable to use the AP at all.Specific beats General..
So normally it wouldn't be possible, but the power gives you an AP, that you must use.. Than the Power overwrites the General rule..
So you can use multiple AP, if an power tells you to..
But this power doesn't tell you to use multiple AP.
It just gives you another one that you can only use until the end of your next turn.
So I'd say the 1 AP/encounter limit still aplies.
To which I say: Nonsense!Nonsense. The term "must" does not mean that you ultimately have to regardless of any other conditions. It just means under reasonable circumstances you are required to or suffer a penalty. The implicit penalty in this case being unable to use the AP at all.
To put it another way, if the character were to die before they used this AP, the "must" clause would not resurrect them. I "must" get to work on time, but this does not grant me time travel abilities when I am running late.