Ashnod's Altar and Urn of Godfire on the battlefield.
Your storm count is equal to or higher than five plus the number of times you've cast Aeve from the command zone this game.
({2} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast Aeve from the command zone by paying ({2} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) plus commander tax, if applicable.
Aeve's storm ability triggers, creating a nonlegendary token copy of itself for each spell you've cast previously this turn.
Activate Ashnod's Altar three times by sacrificing the nontoken Aeve and two Aeve tokens, adding six ({C} magic symbol) .
Choose to have Aeve returned to the command zone from your graveyard.
Activate Urn of Godfire's first ability three times by paying ({6} magic symbol) , adding ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) .
Activate Ashnod's Altar by sacrificing an Aeve token, adding ({C} magic symbol) ({C} magic symbol) .
Repeat step 6 until you have enough mana to cast Aeve.