Grab a zombie spawner.

Grab a creeper spawner.

Grab a spider spawner.

Grab a chicken spawner.

Grab a pig spawner.

Grab a cow spawner.

Grab a ghast spawner.

Grab a slime spawner.

Grab 2 skeleton spawners.

Grab a magma slime spawner.

Grab 2 blaze spawners.

Grab 2 endermen spawners.

Grab a pig zombie spawner.

Grab a iron golem spawner.