Every 10 Days Mobs can upgrade themselves up to level 11, and they stop leveling on day 100.
Zombie: 80 Max HP, 14 Max Damage, 12 Max Armor, Immunity to All Weapon Types when Maxed, Max 2 Totems, Upgrades every 10 Days, Spawn Group 3-7 When Maxed, Spawn Rarity compared to Zombies when maxed 90%
Skeleton: 75 Max HP, 5 Max Damage, 26 Max Armor, Immunity to All Weapon Types when Maxed, Max 2 Totem, Upgrades every 10 Days, Spawn Group 3-4 When Maxed, Spawn Rarity compared to Zombies when maxed 85%
Creeper: 60 Max HP, 5 Max Explosion Radius, 10 Max Armor, Immunity to Most Weapon Types when Maxed, Gains the Power of Flight when Level 6, Upgrades Every 20 Days, Spawn Group 3-5 When Maxed, Spawn Rarity compared to Zombies when maxed 95%
