Terraria contains two holiday themed events, one of which being the Frost Moon. The Frost Moon is an event that can be accessed after killing Plantera and contains difficult enemies and valuable drops which help in the late-game. It also spawns a boss and two minibosses so you’ll have to go through it if you want to get all the boss trophies.
Before you can fight the enemies of the Frost Moon you need to start it. The event is triggered by using the item the Naughty Present. This is an item that can be crafted after the Hardmode Jungle boss Plantera is defeated.
The Naughty Present requires three items; 20 Silk, 5 Ectoplasm, and 5 Souls of Fright combined at a Mythril or Oricalcum Anvil.
Silk can be crafted at a Loom with 7 Cobwebs. In total you’ll need 140 Cobwebs so finding a spider cave is the best idea to craft enough Silk.
Ectoplasm is an item which drops from Dungeon Spirits. Enemies which spawn when enemies in the Dungeon are killed only after Plantera has been defeated. The Dungeon Spirits themselves are easy to kill but the Dungeon enemies they spawn from are far more difficult to take down.
Souls of Fright drop from the Skeletron Prime boss. Defeat him and he will drop 25-40 Souls of Fright to craft your Presents.
Once you have the Naughty Present, wait until nighttime and use it to begin the event.
The Frost Moon event contains a large number of unique enemies and a unique progression system. Similar to the Old One’s Army’s wave system, the Frost Moon has 20 Waves to complete. Waves are completed by killing a certain number of enemies which increase your score. Reaching a high enough score progresses you to the next wave. You’ll have to be quick though because once the sun rises the event ends. You’ll want to do this as reaching wave 15 before morning will cause the next day and night to behave as if the game were being played during December, with Christmas enemies spawning and Presents dropping from all enemies.
The first nine enemies are effectively fodder and are
When below half health their sprite will change to show their face ripped off, revealing a mechanical skull. When killed they add 100 points to your score.
The only fodder enemy with drops is the Zombie Elf which drops the Elf set.
Drops from the Everscream
Drops from the Santa NK1
Drops from the Ice Queen
It's recommended to create an arena with a pit filled with traps. These traps can be collected from the Temple in the Jungle biome and will deal with the smaller fodder enemies and Everscreams while you can focus on the Santa NK1s and Ice Queens.
The Frost Moon is a post-Plantera event summoned by using a Naughty Present at night. During the event a number of unique enemies will spawn which will drop valuable items for Mage and Melee classes. Though you have to be quick as once the sun rises the event is over and enemies stop spawning.
Yes! These two events are so incredibly similar that using the same, trap filled arenas is recommended. It cuts down on time and makes fighting both of them in quick succession simple.
Good weapons to use are ones that are effective at crowd control as well as single target damage. Many of the Frost Moon enemies have huge health pools so dealing lots of damage on the tankier enemies is more important than dealing with crowds. Though it's still important to take care of crowds to allow more enemies to spawn. The Influx Waver and Seedler are effective melee weapons which have high single target damage. Tsunami with Holy Arrows are also effective. The Razorblade Typhoon is definitely one of the best items to use due to its piercing and homing abilities as well as its effectiveness on single targets.
If you’re playing Mage, the best weapon to get by far is the Razorpine. It does immense amounts of damage with the right setup. For melee, both the North Pole and Christmas Tree Sword are comparable so pick whichever you like. The other classes don’t get much from this event unfortunately but the Pumpkin Moon event has far better drops for Summoner and Ranged, so try that instead if you use those classes.