There's absolutely no point in adding this limitation on spawners. This basically kills any type of hostile mob farms including IGS.
While you need souls to maintain a spawner that also means you'd need a soul farm, but for a soul farm to work, you'd need... souls...which means it's going to be a loop that sparks no interest to players at all.
Not to mention that shards are hard to get by.
#11256 - Status: closed
7 months ago by Mortum for Improvements