Link: The Desert of Beginnings update wiki page

The Desert of Beginnings update page is listing everything new added in the update. The wiki is also almost fully updated with new content. I'll summarize some content here.

Major changes and features

Read full patch notes here

• Enemies and bosses have adjusted health, most of them increased
• Reduced experience needed to skill up
• New legendary items: Soul Seeker, Starlight Nautilus
• Critters are now catchable with Bug Net
• New vehicles called Go-Karts
• Some chests are now locked and requires key to open. Certain keys can be crafted
• Added Achievements
• Major increase of drop rate for Haunted Hive Mother Summoning Idol from opening Samhain Goodie Bag
• Some large structures can be taken as item and placed elsewhere
• Updated soundtrack

Bosses

• Ra-Akar the Sand Titan
• Igneous the Molten Mass

Notable items

Soul Seeker: Legendary pickaxe. Required for achievement. It's unbreakable.

• Get all required materials
• Get Cipher Parchment, dropped from Igneous the Molten Mass
• Find the Ancient Forge in Molten Quarry, at a distance of 1600 tiles from the Core
• Extrapolate the distance by scanning the following bosses:
• Ra-Akar the Sand Titan is 1000 tiles from the Core
• Igneous the Molten Mass is 1400 tiles from the Core
• Stand next to the Ancient Forge, and then use Cipher Parchment

Starlight Nautilus: Legendary fish. Increases permanent max health. Required for achievement. And no, it's not unbreakable XD.

• You can fish this in lava for 3.38% base chance when fishing actual fish

Godsent King Mask, Godsent King Breast Armor, Godsent King Pants Armor: Strong armor that requires elaborate method to obtain.

• Get 3 key items in The Desert of Beginnings:
• Ra-Akar Automaton from Prince Maze, 1100 tiles from the Core
• Azeos Feather Fan from Queen Maze, 1300 tiles from the Core
• Omoroth Compass from King Maze, 1500 tiles from the Core
• Find the Titan Temple in The Desert of Beginnings, 900 tiles from the Core
• Part of the temple is filled with breakable walls. Break them to uncover hidden rooms
• Use the key items to open the chests, each containing one Godsent King equipment

Oracle Deck: Required for achievement.

• Find a scene that has a circular maze wall and inside looks like a dozen turrets circling a very important looking thing
• Maze wall has 988 health and 1279 damage reduction so you'll either need a very high mining damage, or simply craft 4 dynamite packs and an electricity generator to blow the wall (clump up the dynamite)
• Destroy that thing in the middle to find a digging spot. Dig up Thread of Fate
• Collect all 9 oracle cards and use the Thread of Fate to craft Oracle Deck

Crystal Meteor Chunk: Good multiplayer support item.

• Find a Crystal Meteor Scene in The Desert of Beginnings. Trust me you'll know when you see it
• Each crystal has 1000 damage reduction so you'll need a minimum of 1001 mining damage
• It has 500 health and will take up to 50 maximum damage, at 1050 mining or higher
• While mining you'll take a constant radioactive damage
• Up to 8 crystals can be mined into shards. Use the shard to craft

Prehistoric Crystal Spear: Strongest flat attack weapon.

• Found through a digging spot on the Mammoth Fossil Scene in The Desert of Beginnings
• And small chance to obtain through digging spots in The Desert of Beginnings (2.65%)

Burnzooka: Great weapon to break walls quickly.

• Dropped from molten quarry chest
• or Igneous boss drop