Orbs are part of the Spells system in Conan Exiles.
The game has added explosive glass Orbs which are grenade like objects that can produce a variety of effects. These are the first steps towards the game's sorcery system. You will be able to create 1 of 4 types of orbs: grease, fire, gas or water. You will have to capture an alchemist thrall, break them and put them to work in a Fireball Cauldron to give you the recipes for them. Water puts out fire, fire orbs explode on impact and leave a burning fire, grease orbs will cause slippery surfaces and can be ignited and gas orbs can be created with new puffer mushrooms to create poison.