Kindred Journeys

Updated Special Mobs to 1.0.4. Goodbye, superspeed Ghasts...
Updated Deadly World to 1.1.1.

Harvester spawn chance quintupled because you shouldn't be forced to sit and wait out repeated nights for the game to let you progress just because of bad luck. Bloodmoon Ninetales remains tied to invasions because that fight is tougher and those are scheduled, not luck-based.

Emerald drops from Illagers are now suppressed until defeating the Harvester.

Twilight Forest Hollow Hill loot increased. This is because Medium and Large hills are slightly bugged, and some boxes spawn entirely surrounded by stone. Hopefully this change will make up for that. Also, Moonworm Queen is now totally guaranteed in all Large hill boxes.

Spectres now are dispelled with any light, not just light bright enough to prevent mob spawns. Curses are mean, so this hopefully offsets that huge consequence.

Cavern, Nether, and Huge Cavern now have traps. Break them for some helpful loot.

Cavern now has additional dungeons with rare loot, making Iron Plates and other materials easier to find in the earlygame.
Cavern Silverfish nests and random spawners now have loot chests under them. These chests always contain emeralds and/or Mana Powder, so you can't trap yourself as easily.

Nether now has occasional spawners. They'll spice up your adventuring, and if you can handle them, make grinding less annoying.
Nether spawners have loot chests under them with Fortress loot.

Huge Cavern has a lot more spawners than before. Brutal spawners are topped with diamond blocks and cover loot chests.
Huge Cavern now has "hidden" valuable loot chests to ease up on the initial ore hurdle. These chests should always contain Manasteel Nuggets to relight your portal in case of accidents.

Cavenia now has excessively strong spawners. Now you have a reason to care about things that deal with multiple mobs at once.