Runic Repetition Combos

Runic Repetition and Seething Song exiled with Eye of the Storm. All permanents on the battlefield. An additional instant or sorcery with flashback and with mana cost {R}{R}{R}{R}{R} or less in hand or graveyard. Enough mana available to cast the additional spell.

Mizzix of the Izmagnus on the battlefield. Runic Repetition in your graveyard. All other cards in hand. You have at least two experience counters. Lands you control can tap to produce at least {U}{U}{U}{U}{R}.

Vadrik on the battlefield. Runic Repetition in your graveyard. All other cards in hand. Vadrik has power 3 or greater. Lands you control can tap to produce at least {U}{U}{U}{U}{R}.