Essence of Control is a crafting resource in Ultima Online primarily used in the Imbuing system. It is one of several essences required to enhance or modify magical properties on weapons, armor, and jewelry. This essence is obtained as a loot drop from mechanical-based creatures such as clockwork scorpions, golems, and other automaton-type enemies found in specific dungeons and areas. Due to its use in imbuing high-end gear, Essence of Control is consistently in demand among crafters and warriors seeking to maximize their equipment’s effectiveness. It is typically sold in bulk by adventurers who farm mechanical creatures, and its market value fluctuates based on shard economy and supply levels.