Kitsa has power 2 or greater and does not have summoning sickness.
Artifacts you control can tap to produce at least ({2} magic symbol) .
({2} magic symbol) , plus an additional ({11} magic symbol) ({U} magic symbol) ({U} magic symbol) minus ({1} magic symbol) for each other artifact you control available.
Steps
Activate Thran Forge by paying ({2} magic symbol) causing Kitsa to become an artifact until end of turn.
Cast Blinkmoth Infusion by paiyng ({12} magic symbol) ({U} magic symbol) ({U} magic symbol) , minus ({1} magic symbol) for each artifact you control.
Kitsa's prowess ability triggers, giving it +1/+1 until end of turn.
Holding priority, activate any number of mana-producing artifacts you control, adding at least ({2} magic symbol) .
Activate Kitsa's second ability by paying ({2} magic symbol) and tapping it, copying Blinkmoth Infusion.
Resolve the copy of Blinkmoth Infusion, untapping all artifacts you control.