({2} magic symbol) ({U} magic symbol) ({U} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast
Will of the Temur by paying its mana cost, targeting a creature you control.
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
Will of the Temur, targeting
Naru Meha.
Resolve the copy of
Will of the Temur, creating a token copy of
Naru Meha.
Put either
Naru Meha into your graveyard due to the legend rule.
Repeat from step 3.
Notes
You can choose both modes if you control a commander as you cast
Will of the Temur to get infinite card draw for any number of players.