Idea here, a haste jewel. It would be be flashy pretty colored stone like a diamond in the sun. Only looted in maus 1-6. Potential stats start at 5% and end at 25% so the power can't be abused and only 4 can be slotted at a time making the highest gem speed 100% plus awakened stats and the buff in maus 1-6 goes from 2%-12, 2% points each map.