Having lots of expereince in consoles, there's a suitable idea in the Zelda series - the Wallmaster, which is similar, but not the same.
However, rather than wandering around the room, it hovers above Link, its shadow slowly growing until it comes down upon him, then returns him to the start of the dungeon or wherever.
Sorry for that.
Some thoughts:
The tornado would possibly be on the elements layer. So it wouldn't be able to go through tar, but would be able to go through monsters. It also wouldn't go through potions, scrolls or force arrows. Unless you can put potions on force arrows, I haven't really tried it.
I'd go the same size and speed as Beethro. I'd also go that it doesn't count as a monster, so rooms can be cleared with it still whirling about. It would circle around Beethro clockwise unless it hit something, in which case it would move directly towards him. If it gets caught so it can't move, it fades, then reappears next spawn at its starting location.
It would dump you back in the previous room, just to make things easy. Almost like accidently hitting 'r'.
Matt
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