Artifacts you control can tap to produce at least ({4} magic symbol) .
Mana Needed
({U} magic symbol) ({R} magic symbol) plus enough mana to cast
Blinkmoth Infusion and pay for commander tax, if applicable available.
Steps
Activate all mana-producing artifacts you control by tapping them, adding at least ({4} magic symbol) .
Cast
Rootha either from your hand or from the command zone by paying ({1} magic symbol) ({U} magic symbol) ({R} magic symbol) plus commander tax, if applicable.
Cast
Blinkmoth Infusion.
Holding priority, activate
Rootha by paying ({2} magic symbol) and returning it from the battlefield to your hand, copying
Blinkmoth Infusion.
Activate
Twinning Glass by paying ({1} magic symbol) and tapping it, casting
Rootha without paying its mana cost.
Resolve the copy of
Blinkmoth Infusion, untapping all artifacts you control.
Activate all mana-producing artifacts you control by tapping them, adding at least ({4} magic symbol) .