Kuiil, Desert Mechanic

When Kuiil, Desert Mechanic enters the battlefield you gain 5 {e}
When Kuiil, Desert Mechanic is in play artifacts
cost {2} less to cast
{x}{1}{t}: Kuiil, Desert Mechanic can take an
Artifact from the graveyard and place it
on the battlefield where X is its CMC
Kuiil, Desert Mechanic can be your Commander