Deep dark beacon

So, this is a long one...

For the deep dark city, I believe that the main objective of actually going there would be to get a certain type of beacon. Though not a beacon of buffs, but bad potion effects to everyone who enters a certain radius (except the player who placed it), things like wither and poison, definitely blindness. Though it should also be able to summon the warden (maybe it would appear chained to the beacon or its power) at the sacrifice of two netherite ingots. Also all skulk blocks placed inside its radius would respond to you. So say an enemy invaded you base, and triggered a skulk sensor, it would alert you, maybe giving a basic description of the player, such as "blue skin western quadrant" or something. Maybe this is a bit over-powered, but to get past something that can insta-kill you is usually a challenge.

One last thing, can you make the beacon an actual shaft of light instead of a simple white rectangle?

Thanks for reading!