Baldur’s Gate 3 is a story-rich, party-based RPG set in the universe of Dungeons & Dragons, where your choices shape a tale of fellowship and betrayal, survival and sacrifice, and the lure of absolute power. (Website)
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I did the opposite on my first playthrough. I flew up the tower on the outside. Stealthed a bit around invisibly, watched Ketheric just standing there and doing nothing.
That's also where I learned that invisibility in BG3 drops when you steal something.
Which is not the case for Greater Invisibility (part of why it's so great!)
Not quite, for each action you do while in greater invisibility you need to succeed on an increasingly harder stealth check or be revealed, its not reliable like in DnD 5e.
While true, if you're just looking to steal something once you probably have to roll a 1 to become revealed.
If you want to get deep into the shenanigans, have someone cast Pass Without A Trace on your character before you apply Greater Invis (with someone else, since both are Concentration) and make sure your sneak thief has advantage on Stealth checks from somewhere (there is a Leather Armor that grants this for example).
You can probably kill off a couple of enemies in a group before breaking Invis (and thus never entering combat) with that setup, especially if you also have Expertise.
How did you fly up? How were you able to select the roof to fly to?
I wildshaped into a raven. I don't remember where exactly I went, but I went around the tower level by level until I was at the top.
I thought they patched that out. It was very important to getting those incredibly short speed runs, but some people accidentally skipped all of act 2 so they patched it out.
I tried this for almost an hour but never got to the other side. Where did you went from?
Is this fellow talking about the Oubliette? Never really understood what was the point of this area in the first place. Escape from prison?