portal arrow aggression

So, what I want, is an easter egg sorta thing, let's say, if you fire around, 7-10 arrows through a nether portal, it will guarentee an attack from some angry piglins/zombified piglins (or maybe other nether mobs, though, piglins would be the most balanced)

the reason I want this done is because it would be a neat easter egg, in the same vein as exploding beds/respawn anchors

how it could be done is simple, having a counter stating how many arrows are shot through a portal, and if it's reached its limit, it spawns an attack

1 new gamerule could be done with this mechanic,

/gamerule PortalArrows {integer} {integer}

this would determine how many arrows are required to pass through the portal to spawn an angry group of monsters, the first integer being the minimum, the second being the maximum.

a datapack value could also be related to this, which would determine what can come through the portal.