Hardmode boss
Skeletron Prime (Terraria 1.4.5)
Skeletron Prime is boss #15 of 33 in our Terraria 1.4.5 order (main boss 12 of 18). Summon: Use a Mechanical Skull at night. HP: 59,000 Classic / 88,500 Expert / 112,836 Master; base defense 24. Key drops: Soul of Fright, Hallowed Bar and Mechanical Battery Piece. Beating it unlocks Souls of Fright; with all three mechanical bosses down, Plantera's Bulbs start to grow and Chlorophyte can be mined. Fight it after The Destroyer and before Plantera.
Skeletron Prime stats
Health counts all parts together.
| Stat | Classic | Expert | Master |
|---|---|---|---|
| Health | 59,000 | 88,500 | 112,836 |
Base defense 24.
Skeletron Prime in the game
How to summon Skeletron Prime
Mechanical SkullUse a Mechanical Skull at night.
Why fight it at this point
Usually the hardest of the three mechanical bosses, so most guides leave it last.
What Skeletron Prime drops
Soul of Fright
Hallowed Bar
Mechanical Battery PieceDrop rates and mode-only items differ between Classic and Expert or Master (treasure bags). Full drop table on the Terraria Wiki.
Tip
You only need to kill the head; the four limbs are optional and the cannon and laser are the dangerous ones.
Back to the boss order checker · Mechanical boss order · Class setups for this stage
Questions players ask
How do I summon Skeletron Prime?
Use a Mechanical Skull at night.
How much HP does Skeletron Prime have in Master mode?
112,836 HP (all parts together). Classic: 59,000, Expert: 88,500.
What does Skeletron Prime drop?
Soul of Fright, Hallowed Bar and Mechanical Battery Piece. The wiki lists the exact chances.
What should I do after Skeletron Prime?
The next main boss is Plantera.