This is the best verison of an infinite mana, gems and damage deck that I could come up with, it is challenging and fun to play. It is also satisfying when you pulled it off.
Set Up:
2 blue gems, 2 red gems, 1 green gem and 2 purple gems (minimum)
War Fan
Root of the World *1 (recommend to have 2 copies on board, so Dwarf and K-nine/K-nine Handler/Modframe can be played at the same time, saving some times. In addition, Root is recommended to be played on the left side of the board for best APM)
Forge Smith *2
Ruby Raider *1
Gemhold Dwarf *1
K-nine/K-nine Handler (require 1 additional green gem)/Modframe (require 2 orange gems) *1