Hook reveals stealth Assassin & other hitscans
Jonathan Alphonso
If you move around the target for hook, the arrow will indicate if the currently targeted tile is occupied by a stealth assassin.
There are similar issues with Warlock's master's call.
Also, on PC, Warlock portal makes a small sound if you hover over a tile with a hero. This lets you find enemy heros right away by moving the card around the arena.
Георги Петков
Every single skill should be tested. This applies not just to heroes, but monsters and lamps as well (same for chests and doors, but those are irrelevant). Those are noticeable with the Warlock's portal, because you can use it on the whole map without any line of sight.
Another example is casting a lure with the archer - tells you the exact location of the assassin. There are probably more. This one could also be PC only, I haven't tested on VR.
Edit: booby trap also reveals the location (although it has much more limited a range).
Jonathan Alphonso
Георги Петков: I only have the vr Quest 2 version of the game. There is no hitscan with the portal in this version. Most other hitscans are present though.
Георги Петков
I know, that's why I extended your report with what I know.