Your only healer got poisoned around a week ago and had to be taken to an outside healer. You were trying to calculate if he was likely to be nearly back yet. Unfortunately not.
We were also trying to decide whether or not to show him the storeroom of magical items. Emphasize that most of the weapons are probably cursed, and though you'd feel terrible if our savior were to grievously wound himself with one, you'll leave it up to him whether the risks are worth it, or if he'd prefer the trusted guards' armory. Either way, get ourselves a weapon from the guards' armory.
I like this option.
Yes, let's do this.
You explain to him that your healer was poisoned about a week ago and you had to take him to an outside healer, and were mentally trying to calculate whether he'd be back yet. Unfortunately not.
You further add that you were trying to decide whether to show him your storeroom of magical items- while powerful, they are dangerous and unpredictable, and you wouldn't want him to hurt himself using one of them. Still, you feel that should probably be his call.
The hero helps you to your feet, tells you you'll have to find you a healer later then, and says he'd like to take a look at this magical armory. The trip gives you a bit of time to think.
Gasp into a false realization that YOU used to be the healer, but your memory is so clouded with former EVIL that you don't remember your full craft yet.
Get your HEAL on by applying a bandaid over your wound and hoping it doesn't get infected.
You are fairly certain you are not a healer. Bandaging your wound would indeed be a good idea, though; you should look into that.
By the way, why are we the Emerald Overlord. I understand Overlord, but Emerald?
Probably some deep, intensely relevant, yet-to-be-revealed reason.
That or it sounded nicer than YOU ARE OVERLORD which was already taken at least twice anyway.
You arrive at the magical armory.
He seems to like what he sees.
Assuming this hero is also an adventurer, as you now assume, it's likely he'll be in there digging around for magical gear for a while. Adventurers are notorious for not being able to resist shiny glowy things, even when they already have something better and it's obviously a trap.
This gives you some time, but you're not sure how he'd feel or whether he'd notice if you ran off.
Plus, now you're curious what he'll pick out or experiment with. Is there anything you hope he gets, hope he doesn't get, or are just curious about? Or is it all the same to you?