Can I wish myself next to someone undetectable?
What happens if I summon creature into his square?
What happens if I try and enter his square.
When do I notice his actions? When attacks me? Hits me? Damages me?
Can I backplot an arrow or even see it coming?Just wondering if there is any rules consensus on this stuff.
Bump... very interesting questions... I have no clue though.
Undetectable: This grants its bonded user the ability to become utterly undetectable while invisible. While invisible and in physical contact with this item, the bonded creature can't be detected or scryed by any method.
According to the rule as it is written, I would say:
1.) You can wish yourself to a location that happens to be next to them, but it could only be by accident. The spell says you may transport to a location ('anywhere'), and a person is not a location, so you couldn't choose them as a target.
2.) You cannot summon a creature into their square, and you will know that your summon failed, but you will not know why. There are multiple reasons why a summon could fail, and even if you managed to rule out other options, you wouldn't know whether it was a person.
3.) You change your mind at the last second, and either move somewhere else or don't move at all. Alternatively, you squeeze past them but don't notice that you're doing it.
4.) You don't notice them until invisibility wears off. Anything they do to you seems like a random accident or trick of the gods.
5.) No.
It's insane, but that's what it currently does. No, it should not work that way, and yes, it should be errata'd.
If a mythic creature is invisible via the spell (or a mythic path ability) and has a bonded item with undetectable does that defeat an enemy who has see invisibility or another ability (true seeing for example) which would usually defeat invisibility?
Yes, and it also defeats things like Blindsight, Tremorsense, and Echolocation; abilities that would normally bypass Mindblank. They can also move undetected across sand, powder, water, etc.
Your only options are Glitterdust, Invisibility Purge, and similar means of removing/negating invisibility.