Hardmode Invasions: Pirate, Martian Madness & Moon Events (1.4.5)

Terraria's Hardmode invasion events — Pirate Invasion, Martian Madness, Frost Legion, Pumpkin Moon and Frost Moon: triggers, kill counts, and the drops that matter.

10/5/2026 1.4.5.8 Terraria Wiki Team 4 min read

FAQ

How do you trigger the Martian Madness event?

Let a Martian Probe escape. Probes spawn randomly in the outer thirds of the world (more often in the Space layer) after Golem is defeated — if one scans you and flies off, Martian Madness begins. Killing the probe before it leaves prevents the event.

How many kills does a Pirate Invasion take?

120 + 60 per player with 200+ HP — 180 solo, 600 with eight players. It can roll at dawn once the world is in Hardmode (roughly 1/30 before the first clear, 1/60 after, and only when the Goblin Army roll fails) or be summoned with a Pirate Map dropped by ocean enemies in Hardmode.

What's the difference between Pumpkin Moon and Frost Moon?

Both are 20-wave night summon events ending at 4:30 AM, and both summon items need post-Plantera materials (though they fire in any world). Pumpkin Moon (Pumpkin Moon Medallion) is the easier one — Mourning Wood and Pumpking drop swords, guns, and the Raven Staff. Frost Moon (Naughty Present) is harder — Everscream, Santa-NK1, and Ice Queen drop the Elf Melter, Chain Gun, Blizzard Staff, and the best event loot in the game. Reaching wave 15 of either unlocks that holiday's decorations for a day.

When does the Frost Legion spawn?

Never randomly — it's summon-only. Snow Globes drop from Presents during the Christmas season in Hardmode, but the globe works in any world at any time of year. Defeating it is what lets Santa Claus move in during Christmas.

Can two invasions happen at once?

No — the game enforces one invasion at a time. A Goblin Army check failing is what lets the Pirate roll happen at dawn. Bosses and Blood Moons can overlap an invasion, but never two armies.

The Hardmode invasion lineup

Pre-Hardmode has one army: the Goblin Army. Hardmode stacks three more invasions on top plus two summonable “moon” marathons — and each one drops loot that normal enemies never will. Here’s the full roster.

Event	Trigger	Required kills	Signature loot
Pirate Invasion	Dawn roll in Hardmode (gated behind the Goblin check), or Pirate Map (ocean enemy drop)	120 + 60×players	Cutlass, Lucky Coin → Coin Gun wealth loop, Pirate Staff, Discount Card, unlocks Pirate NPC
Frost Legion	Snow Globe (Hardmode drop from Christmas Presents, usable in any world)	80 + 40×players	Snow Block drops, unlocks Santa Claus during Christmas season
Martian Madness	Martian Probe escapes after Golem	160 + 40×players	Xenopopper, Influx Waver, Cosmic Car Key (infinite flight mount!), Laser Machinegun
Pumpkin Moon	Pumpkin Moon Medallion at night (post-Plantera materials)	20 scoring waves	The Horseman’s Blade, Raven Staff, Spooky armor, Candy Corn Rifle, Jack ’O Lantern Launcher
Frost Moon	Naughty Present at night (post-Plantera materials)	20 scoring waves	Elf Melter, Chain Gun, Blizzard Staff, Snowman Cannon, North Pole, Baby Grinch

Pirate Invasion

Pirates behave like goblins with better loot and a steeper bill: the invasion spawns at a world edge and marches on spawn, the kill requirement is 120 + 60×players (the Goblin Army’s 80 + 40 looks gentle by comparison), and Pirate Maps — dropped by anything killed in the Ocean biome during Hardmode — summon it manually. The random dawn roll needs the world in Hardmode plus the Goblin check failing first. Defeating it unlocks the Pirate NPC — seller of the Cannon and pirate furniture (full roster and move-in conditions in our NPC list). The Discount Card (20% price cut) and Lucky Coin (money drops on hits — pair with the Coin Gun for the wealth loop) are the standouts, plus the Cutlass, a legendary-feeling melee sword for early Hardmode.

Martian Madness

After Golem dies, Martian Probes start appearing in the outer thirds of the map (most commonly in the Space layer). The probe scans you; if it escapes upward, the event begins — “Martians are invading!” — and UFOs flood the sky. Kill count runs 160 + 40×players, and Martian Saucers only spawn once the progress bar passes 30%.

The saucer is the whole point: it drops the Cosmic Car Key — the infinite-flight UFO mount, and one of the best traversal items in the game — plus the Xenopopper, Influx Waver, Laser Machinegun, Electrostatic Launcher, and the Charged Blaster Cannon. Pro-tip: deliberately let the probe escape; you can trigger Madness on demand any time you’re near space.

The moon events — Terraria’s hardest waves

The Pumpkin Moon and Frost Moon are a matched pair: summon them at night with their medallions, then survive 20 scoring waves until 4:30 AM. Waves advance by kill score, not time — Expert worlds get a 2× multiplier, Master 2.5×. Reaching wave 15 earns the achievement and, at dawn, enables the matching holiday’s effects for a full day.

Pumpkin Moon (easier): Scarecrows and Splinterlings early, Mourning Wood and Pumpking as the boss waves — guaranteed trophies on the final wave. Boss loot chances gate by wave: ~11% when bosses first appear, up to 100% by wave 20 (wave 12 in Expert). The Raven Staff and Horseman’s Blade are the classic pickup; 3410 points to wave 15, 10160 to clear.
Frost Moon (harder): Present Mimics can appear in any wave; Everscream → Santa-NK1 → Ice Queen escalate through the late waves. Ice Queen is the fast flying boss at the top; the Chain Gun, Blizzard Staff, and Snowman Cannon are the headline drops. Its gating curve is harsher: ~11% from wave 4 up to just 33% by wave 19 — but Expert reaches 100% by wave 14, and final-wave Everscreams, Santa-NK1s, and Ice Queens drop guaranteed trophies.

Both events want the same setup: a wide flat arena, campfire/heart lantern network, battle potion, and the strongest multi-target damage you own. Summoners shine — a field of sentries from the Old One’s Army does heavy work.

Screenshot sources: cover and gallery — wiki.gg gameplay screenshots.