Expiration of the Day

i nerfed zombies wooooo

• zombie aggro speed reduced by 19%
• removed plains from biome spawn whitelist (tectonic will sometimes turn a plain into an ocean for some reason)
• fixed issue where an entire infinity cave biome would occasionally be filled with lava
• removed underground rivers and lava rivers

also, for some reason, zombies still move at lightspeed when they aren't aggroed on you. the speed nerf is only applied when they are aggro on you. not a huge issue though