I did.
It's basic in the horse ray beam functions,but i don't understand the blot things.
It's basically just
OnActivate > Self >SpawnProjectile > Horse Ray (whatever direction)
Block receiving the horse rays:
OnProjectileHit > Projectile > Explode
I don't know about this event,but i think it might be it:
Block recieving horse rays event:
OnExplosion(?) > some random jibberish that i couldn't uncover
I have never visited Isar Tower ever,just saying.
My version has the block receiving the rays spawn another one to bounce off the sender for infinite rays.