NOTE: The concept and the ratios need a little tinkering. The Lore and quotes are a W.I.P. Feel free to contribute to the cause by doing some constructive criticism and/or adding ideas.
Lasco used to be the famous Crimson Elite blacksmith , known because he could fix and craft anything , and most importantly for the craft of Darius' and Draven's axes. Since he could fix anything , Riven brought him her broken sword. He tried to fix it , but it was impossible! The Metal was made of unmatched power that nobody ever seen before! Riven declared him as amateur Blacksmith and banned him out of Noxus. Lasco then made his way to Zaun to work on the Zaun Scientific Lab. For his first project he was given a piece of green hardened goo. He had to craft a ball and then make it flexible. It was piece of cake to him , but he took way more time than he usually does because that goo was something he never seen before. He did his job , created the ball of goo and went home to sleep because he had finished the project late at night. He wakes up and sees the ball of goo was now a living thing that talked! He was careful and saved the goo inside a cage , because he was working in a lab he didn't know what would happen. The Leader of Zaun gave him a second project: Train the goo to be a strong soldier. He did as he was asked and he named that goo: Zaun Amourphous Combatant , or ZAC for short.
" Lasco - Who said hard things are the strongest? "