The Flash method of detecting invisible creatures -- does it work?

[Ashtagon]

Maybe treat it as an overrun special attack?

i.e....

1 - attack of opportunity.

2 - opponent always has the option to simply step aside. As an invisible creature (or even as a visible creature), this is automatically successful under raw. If he does step aside, you simply fail to detect him. Given that he is invisible, I would rule that the Improved Overrun feat does not stop him from avoiding.

3 - opponent has the option to block you. This is a Str vs. (his Str of Dex) contest, with size modifiers applied. Defender gets +4 if quadruped or a dwarf. If you win, target is prone. If you lose, defender may make the same check against you to knock you prone.

 

[howandwhy99]

My preference would be to do these rolls behind the screen so the player doesn't know when their movement generated an attack an when it didn't. It could get tedious otherwise.

 

[kitcik]

Maybe treat it as an overrun special attack?

i.e....

1 - attack of opportunity.

2 - opponent always has the option to simply step aside. As an invisible creature (or even as a visible creature), this is automatically successful under raw. If he does step aside, you simply fail to detect him. Given that he is invisible, I would rule that the Improved Overrun feat does not stop him from avoiding.

3 - opponent has the option to block you. This is a Str vs. (his Str of Dex) contest, with size modifiers applied. Defender gets +4 if quadruped or a dwarf. If you win, target is prone. If you lose, defender may make the same check against you to knock you prone.

And if they avoid you get an opposed Listen / Move Silently to determine what square they are in?

 

[Ashtagon]

And if they avoid you get an opposed Listen / Move Silently to determine what square they are in?

That (with the usual modifiers for him being invisible, and for you running) seems reasonable.

I'd also rule that if he makes an aoo and misses, that also allows an opposed Listen/Move Silently check. If hit hits with that aoo, he's given his location away automatically.

 

[Vegepygmy]

I would treat it as an overrun and allow the invisible creature to simply avoid The Flash at its option. I would not call for a special opposed Listen / Move Silently check because the invisible creature isn't actually moving from his square, but the usual Listen / Spot rules for invisible creatures would still apply, of course.

If The Flash stopped in the invisible creature's space, I'd simply rule that the invisible creature has to move to a legal space on its turn or else it "bumps into" The Flash.

In summary, no, The Flash's tactic wouldn't work at all.