Rituel
Convergence — Créez un jeton de créature-artefact 1/1 incolore Mécanoptère avec le vol pour chaque couleur de mana dépensée pour lancer ce sort.
Unless a spell or ability allows you to, you can't choose to pay more mana for a spell with a converge ability just to spend more colors of mana. Likewise, if a spell or ability reduces the amount of mana it costs you to cast a spell with converge, you can't ignore that cost reduction in order to spend more colors of mana.