Why are Zombies so hard to come by?

Hello, fairly new to the server about a week and a half.
Was wondering why I cant find any zombies or if i do, its rare. im trying to rank up and its difficult to find 20 zombies on a server that barely has them spawn in.
Yeah, i could BUY a spawner, but thats nearly impossible unless i use irl money.

Lucid the server has a lowered spawn rate, when you see SlimeManCody (myself) just say something in chat and you are more than welcome to use my hostile mob grinder

MonsterSlime said:

Lucid the server has a lowered spawn rate, when you see SlimeManCody (myself) just say something in chat and you are more than welcome to use my hostile mob grinder

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Thanks man! I'll send you a message when im on and youre on!