Sevanar, Consul of Mechanics

Accumulate {r}{g} (You may pay the Accumulate
cost. If you do, replace all instances of generic
mana costs in the casting cost with {x}.)
When Sevanar enters the battlefield, create a
colorless battery artifact token, it has {t}: Sacrifice
this artifact, add one mana of any colour to your
mana pool. If this spell's accumulate cost was
paid, instead create X battery tokens.
"The Consul of Mechanics has a proposition"