Allie Garfinkle / Fortune:Mytra, which is building autonomous robots for warehouses that can move loads up to 3,000 pounds, raised a $120M Series C led by Avenir Growth — Senior Finance Reporter And Author Of Term Sheet — Mytra's Chris Walti (L) and Ahmad Baitalmal (R).MYTRA — Chris Walti once led engineering for Tesla's humanoid Optimus.