Prehistrium is a Legends of Idleon monster: 12 drops, gives 1 resource.

Prehistrium | Idleon Toolbox

Prehistrium

Prehistrium_Card

Increases Base Damage Dealt to all monsters by 400. Golden foods are never consumed.

Golden_Nomwich

Increases Move Spd by 10%. 1% chance to be consumed every 10 meters walked. Must be equipped in a Food Slot to give its bonus.

Small_Speed_Potion

Smelt down 20000 Ores into 1 Bar at the Forge. Smelting will take 15000 per Bar using Forge Slot 1.

Prehistrium_Ore

Hold down on this item to turn 10 Fragments into 1 Talent Point Reset Potion. You'll need 1 open inventory space for this to work.

Talent_Point_Reset_Fragment

Hold down to add a Silver Pen to your Post-Office! You can use it to skip a Delivery!

Silver_Pen

Book_Stamp

High_IQ_Lumber_Stamp

Drag onto any Armor to apply. Success Chance; 100% Uses up 1 slots only if Successful

Armor_Upgrade_Stone_I

Drag onto any Tool to apply. Success Chance; 100% Uses up 1 slots only if Successful

Tool_Upgrade_Stone_I

Drag onto any Equip to apply. Success Chance; 100% Uses up 1 slots only if Successful. WARNING:Mystery Stat has a chance to be Negative, and reduce stats!

	Name	Qty	Rate	Chance
Base drops
	Prehistrium Card		1 in 1,000,000	0.000100%
Rare Drop table rolls 1 in 67DropTable4
	Small Speed Potion	5	1 in 333	0.300%
	Armor Upgrade Stone I		1 in 2,220	0.0450%
	Tool Upgrade Stone I		1 in 2,220	0.0450%
	High IQ Lumber Stamp		1 in 74,100	0.00135%
	Book Stamp		1 in 444,000	0.000225%
Mega-Rare table rolls 1 in 11,100SuperDropTable1
	Mystery Upgrade Stone I	2	1 in 13,100	0.00765%
	Golden Nomwich		1 in 22,200	0.00450%
	Special Talent BookRoll Da Dice Lv 100		1 in 111,000	0.000900%
	Talent Point Reset Fragment		1 in 111,000	0.000900%
	Special Talent BookAttacks On Simmer Lv 50		1 in 111,000	0.000900%
	Silver Pen		1 in 159,000	0.000630%
	Lucky Lad		1 in 37,000,000	0.00000270%

Wiki

Prehistrium

Drops

Gives