If anyone comes for him before she gets back, he'll have a chance to make a break for it. Not a good chance, but a chance. The orders are gone, at least.
This is convenient, because the bit of gold in his head was meant to regrow his entire body in an emergency. It can handle dehydration. Just not comfortably.
And in time Promise comes back, and reopens the little gate, and starts passing through what he asked for.
"Before I start, can you give me directions from the dungeon back to the balcony gate? If it's still open, that is. I should come back to Scadrial to recharge properly before moving on the Queen, and you'll need the same."
"The dungeon exit is the opposite of the way you're facing. Go up six floors, go straight across the atrium - both of these are usually accomplished by flying - go down the rightmost branch of the hallway, take the third door on your right, you will see the balcony on your right and will have a decent shot of jumping into the gate from there."
Can you make me undetectable again? I'll probably be being chased on the way out, and any advantage helps."
And Alendi finally works his way out of the bulk of his chains, and begins scaling the wall. He'll be at the top of it much more quickly than an ordinary climber could be expected to.
At the top there is a grate. Promise helpfully melts it for him; her little gate is angled to allow that.
Good, that's much stealthier than breaking it. Alendi exits the pit (finally!) and heads toward the balcony.
But even without the reserves to casually make everyone else freeze, he's still faster than his attackers. And he can still see the attacks before they happen. The visible ones, anyway. Chasing and impaling are not going to be very effective.
Next up: Six floors' worth of fairy stairwell. Repeatedly jumping off walls and upward works fairly well, under the circumstances. It may, however, make his position predictable.
The heavy thing knocks Alendi out of his trajectory. He falls a flight or two before catching himself on one of the landings, and decides there isn't much choice but to head back through the well and try to avoid heavy things.
The deafness doesn't help with avoiding them. Okay then, time to spend more resources than he can really afford to go straight up through the heavy thing-free ceiling.
He tries that.
The more important question is, how far across the atrium does he get?
He runs down the hallway and tries the third door on the right.