Twisted Fate doesn't get to use the Mana from Seraph's Embrace

Twisted Fate gets enough Mana to cast Wildcard Twisted Fate Uses 50 Mana and starts cycling through the cards While cycle goes, he gets 20 mana from Seraphs Card is chosen Card is thrown and 20 Mana from Seraphs is depleted without any use or contribution to next Wildcard