A Terrible Mind

Type	Tool
Use time	15 (Very fast)
Tooltip	Boosts tile and wall placement speed
Grants Buff	A Terrible Mind
Buff tooltip	Tile and wall placement speed are increased
Rarity
Buy / Sell	5 / 1

A Terrible Mind is a Pre-Hardmode book that is purchased from the Ghostwriter for 5 after the Brain of Cthulhu is defeated. When used, it drastically boosts the player's placement speed, similarly to the Builder Potion.

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Usual Tools
Digging Tools	Pickaxes	Fractal • Selfsimilar • Polar
Multi-use Tools	Hammer and Axe	Sunplate • Fractal • Selfsimilar • Polar

Summoning Tools
Pets	Rocket Snek • Futuristic Bowl • Storm Roe • Cosmic Communicator • Batty Pen Drive • Spark of Similarity • Bloody Blood Cell
Light Pets	Apollonian Roe • Winged Everlight • Porous Cuboid
Mounts	Bellerophon's Saddle

Other Tools
Grappling Hooks	Skyhook • Starhook • Endless Hook • Phagefoot Hook • Hemolytic Hook
Books	Strange Obituary • The Sliming • Maws • A Throng of Eyes and Fliers • The Construct out of Space • The Very Hungry Worm • A Terrible Mind • Batula • Queen of the Bees • Skulduggery Unpleasant • A Wrinkle in Space • The Perks of Being a Wall Tower • Eye Robots • A Fight to Remember • Skeletron 2: Electric Boogaloo • The Wings on Our Star • The Phage Runner • The Grape's Wrath • Beltrami's Elements • Rocky With Lasers • Moby Duke • Nightbrawl • Last Blood • The Haunter of the Stars • The Magnet Thief • The Call of the Moon Lord
Other	Fishing poles (Fractal) • Strange Barometer • Strange Clock • Twisted Mirror • Fractal Conch • Everlight (Mk. 2) • Strange Jewelry • Strange Samples • Fractal Timer • Duck Spewer • Sturdy Solar Tablet • Sturdy Blood Tablet • Infinity Sponge