Cormela by paying ({1} magic symbol) and tapping it, adding ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) that can only be spent to cast instant and/or sorcery spells.
Cast
Twinflame by paying ({1} magic symbol) ({R} magic symbol) .
Storm-Kiln Artist triggers, creating a Treasure artifact token.
Resolve
Twinflame, creating a token copy of
Cormela.
Put the tapped
Cormela into your graveyard due to the legend rule.
Cormela dies, triggering itself, returning
Twinflame from your graveyard to your hand.
Activate the Treasure by tapping and sacrificing it, adding ({1} magic symbol) .
Repeat.
Results
Infinite black mana that can only be spent to cast instant and sorcery spells.
Infinite blue mana that can only be spent to cast instant and sorcery spells.