The 1.3 Update was in the works for about a month before being released on the 30th of July, 2017. The update added more than 130 items , quite a few new enemies , two new Bosses and much more, along with lots of balancing and fixes.
Additions [ | ] Added the Ethereal Umbra and all of its loot.
Added the Vinewrath Bane and all of its loot.
The Tide has been overhauled, with changes including:
The Tide can now only be fought at the ocean, enemies will not attack you everywhere.
The Tide ends upon exiting your world.
The Tide now possesses an icon. Added the Cryolite Ore and Thermite Ore.
Added music for the Spirit Biome 's surface.
The Spirit Biome now spawns Spirit Islands upon generation, containing Spirit Chests , which can be unlocked via a Spirit Key.
Added the Ghastblade, Ethereal Dragon, Ghast Beam, Ghast Staff and Wispedge.
Added the Quicksilver armor.
Added throwing weapons to the Blood Moon , Old One's Army , Goblin Army and Solar Eclipse .
Every boss now possesses its own Trophy .
Added the Flame of the Magus, Core of the Berserker and Beacon of the Assassin.
Added the Tattered Script , Shadow Collar , Stardrive Chip , Ancient Grimoire and Support Beacon .
Added the Drakin Teeth, the Antlion Idol and Strange Kelp.
Added the Thermal, Floran and Cryolite elementals.
Added more items which use the Worshipper's Jewel in their recipe.
Added the Flare Treads.
Added the Armor Ability key.
Added The Milestone painting in celebration of reaching the 1000 items milestone.
Much more content that cannot be shown due to a lack of source. Changes/Bug Fixes [ | ] Resprited the Illuminant Master.
Added recipe groups for multiple items.
Fixed the Gargantuan Snail spawn rates.
Reduced the spawn rates of many underground mobs.
Tweaked modded Lihzahrd Temple enemy spawn rates, but gave some vanilla enemies the chance to drop Sun Shards if they don't spawn.
Made the Shard of Thanos ' after images bounce, and made the RMB crystal storms travel in different directions to grant more coverage.
Made the Death Wind faster at the expense of losing its ability to pierce.
Changed a few minion AIs.
Buffed multiple sets, including Geode , Dusk , Pain Monger , Wither and Reaper gear.
Buffed the Holy Burst and Terravolver .
All debuffs on enemies that reduced their damage have been changed.
Fixed all Reach and Spirit Biome enemies spawning during events.
Nerfed Possessed armor.
Nerfed Duskrise Bow.
Fixed Earthblade's debuff causing ghost dummies to move around.
Nerfed Atlas ' damage, but made his arms quicker.
Nerfed Overseer a bit in health and damage.
Fixed all the issues with Shard of Thanos changing damage with different click modes.
Buffed artifact material drop chances in expert mode.
Made Starplate Raider less vulnerable to piercing.
Made Spirit Biome generation convert ice into Spirit Ice correctly.
Fixed a huge amount of spelling errors.
Buffed Hellfire Shotgun immensely.
Fixed Duskwood furniture and it's odd crafting recipes, as well as the Spirit Chest looking faulty.
Buffed all of Folv's weapons.
Changed how the Fate Token works, now it will save you from death once but a 2 minute cooldown will prevent you for using the item again immediately.
Many more changes and bug fixes that cannot be shown due to a lack of source. 
