There is a creature or artifact on the battlefield.
You have enough mana to cast
Stolen Identity.
Mana Needed
({2} magic symbol) ({U} magic symbol) ({U} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast
Stolen Identity by paying its mana cost, targeting a creature or artifact.
Holding priority, cast
Naru Meha either from your hand or from the command zone by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) plus commander tax, if applicable.
When
Naru Meha enters the battlefield, it triggers, copying
Stolen Identity, targeting
Naru Meha.
Resolve the copy of
Stolen Identity, creating a token copy of
Naru Meha.
Put either
Naru Meha into your graveyard due to the legend rule.