Board Thread:Game Help/@comment-33964718-20180130222220

So, I created a new character and loaded up my old world, which was made before the 1.3.0.1 update for the Ps4, and with my oldest account, made an artificial marble biome with 500+ Marble Blocks, however, no Hoplites are spawning, which I want for my new character to get Gladiator Gear and Javelins, but it's not working. Do I need to place walls, and if not, what do I need to do? 