You may not use...
* Any accessories until you beat king slime.
* Items dropped by king slime, tertiary slot items (hooks, improved mine carts, light pets, etc.), and blood moon items until you beat the eye of cthulhu.
* EoC items and meteorite items until you beat the eater of worlds/brain of cthulhu.
* EoW/BoC items (nightmare/deathbringer pickaxes, shadow/crimson armor, etc.), crimson heart/shadow orb items, and floating island items < queen bee.
* QB and goblin invasion items (spiky balls, rocket boots, tinkerer's workshop, etc.) < skeletron.
* Skeletron items (bone gloves and any other items added by mods), dungeon items, molten items, and underworld items (shadow chest items, weapons dropped by underworld enemies, etc.), as well as the reaver shark, which is functionally identical to a molten pickaxe < the wall of flesh. Immediately after beating the wall of flesh, you may not use unholy tridents and hel-fires yet since they've only just become available. Since they're items at your current level of progression, you may not use them; that's the entire point of this class.

* WoF items, cobalt/palladium items, soul of light/night items, items dropped by underworld enemies after the start of hardmode, items that can only be crafted/obtained by killing enemies that spawn in the hallow or underground hallow biomes, wings, and greater healing/mana potions < the 1st mechanical boss you kill.
* Ichor items, cursed flame items, orichalcum/mythril items, pirate invasion items, and items crafted from the souls of the 1st mechanical boss you killed < the 2nd mechanical boss you kill.
* All mimic items (ice mimic items, hallowed mimic items, etc.), adamantite/titanium items, frost/forbidden armor, items crafted from the souls of the 2nd mechanical boss you killed, and hallowed items < the 3rd mechanical boss you kill.
* Chlorophyte items, super mana potions, and items crafted from the souls of the 3rd mechanical boss you killed < plantera.
* Items dropped by plantera (seedlers, leaf blowers, etc.) and solar eclipse items < golem.
* Post-plantera items (shroomite armor, tiki armor, post-plantera dungeon items such as spectre armor, master ninja gear, etc.) < reach the beginning of the 15th wave of a pumpkin moon.
* Golem items and pumpkin moon items < reach the beginning of the 15th wave of a frost moon.
* Frost moon items < duke fishron.
* Duke fishron items < lunatic cultist.
* Super healing potions and martian invasion items < the four celestial towers.
* Items (aside from super healing potions, which may be used 1 tier sooner) crafted from solar, vortex, nebula, or stardust fragments < moon lord.
* Post-moon lord items, including items crafted from luminite bars < defeat moon lord a second time.