A Glob of Goo can naturally be found as a common bright green raw material that can be used for throwing and is an often needed crafting ingredient.
Common green Goo is also randomly dropped by nearly all Creatures when they are killed (with the exception of all Keepa types and several types of event Creatures), but can as well be occasionally obtained by harvesting most Pets.
Purple Goo and Orange Goo are special colored types of Goo that can only be processed from Purple Blocks of Goo respectively from Orange Blocks of Goo since update R55 on August 22nd 2018, however these colored variants are both also simply called "Glob of Goo".
How to obtainEdit
Mold is one of the blocks that the Stalactite layer underground is made of. It looks like Siltstone interveined with Moss. You'll find Mold in floors, walls and ceilings of caves on this layer, more of it can be obtained by creating mine shafts by digging.
Common green Goo can also be obtained from nearly every Creature occasionally, either as a loot when they are killed, or as a harvest if you keep them as Pets and feed them their favorite type of Food.
Purple Goo, also simply called "Glob of Goo", is a special colored type of Goo that can only be processed from Purple Blocks of Goo that can be crafted in your Crafting Menu. After unlocking the free recipe by crafting at least one green Block of Goo and gaining/processing Blue Pigment, you can craft them from green Globs of Goo, Blue Pigment and Stone Rods.
Orange Goo, also simply called "Glob of Goo", is a special colored type of Goo that can only be processed from Orange Blocks of Goo that can be crafted in your Crafting Menu. After unlocking the free recipe by crafting at least one green Block of Goo and gaining/processing Blue Pigment, you can craft them from green Globs of Goo, Red Pigment and Stone Rods.
Different to their tooltip descriptions, neither Purple Goo nor Orange Goo can be obtained from any Creatures, instead they can solely be processed from crafted colored Blocks of Goo.
How to useEdit
You can throw Globs of Goo, no matter if green, purple or orange, by putting them into your quickbar, select the according slot and then right-click while pointing your cursor at the desired destination.
Only one glob from a stack of goo will be thrown in a slightly curved trajectory wherever your crosshairs points, which will cause a sticky goo blot to appear on any solid block you've hit. However, if you hit any liquid with thrown Goo, even if only half a block in "depth", the Goo will vanish and have no effects.
A Goo blot will be of the same color of Goo glob that you have thrown, but it will always appear flat and horizontal, even when thrown at a wall or any vertical side of block or object. Goo blots cannot be picked up nor rotated. They will vanish by themselves after ca. 30 seconds.
Globs of Goo can directly be thrown at Creatures, for example at Keepas that can be hard to "catch", and will slow them down significantly for max. 5 seconds after you've hit them. Sticking to a Goo-blot will not stun or freeze Creatures and will also not prevent Creatures from attacking (or defending themselves) in close combat range though.
Goo-blots from thrown Globs of Goo are solid (you cannot pass through them) and whenever a Creature walks or runs over such a blot, the Creature will be slowed down just like it had been hit directly by a Glob of Goo.
Goo-blots are not sticky for player-characters, but bouncy. You can use them as spring boards until they will vanish. Goo-blots can be thrown at Mushrooms or Tallgrass and the like without replacing them, they will also not take up the same place/block as torches and other such items do. Goo-blots do not burn nor can they be corrupted.
Common green Globs of Goo are also very common crafting ingredients. They are used in crafting Grand Arctek Chests (with 60 slots), Christmas-themed storage gift boxes, Arc Signs, all types of TNT (including Advanced TNT, Strong TNT and Super TNT), Flaming Skulls, Haunted Fireworks and other spooky stuff like Candy Skull Statues and Candy Skull Banners, Diamond Doors, Lumite Doors, lumite furniture, diamond furniture, and many building blocks like Asphalt, Tourmaline Glass, Decorative Stone Floors, Iron Roofs, Lumite Wall, Curl Iron Wall and others.
Since update R17, Globs of Goo can be crafted into solid, but "elastic" and somehow bouncy Goo Blocks - green, orange and purple ones. These blocks can be used as jumping pads or to cushion the fall of player characters.
And, as said, since update R55, orange and purple Blocks of Goo can be processed into colored variants of Goo that can only be thrown.
Please note that purple Globs of Goo and orange Globs of Goo cannot be used for crafting.
Warning: please do not throw Globs of Goo at any usable object like at doors or into doorways, at storage chests, crafting stations, teleporters or the like. There once was a known bug that was able to make Goo-blots prevail permanently in cases like these or could even make usable objects vanish. The bug has been fixed ever since, but there's no guarantee that any new patch won't be able to make this bug re-surface until the next hotfix.