Unification of the Cubic Lords

Fusion Summon 1 "Cubic" Fusion Monster from your Extra Deck, using monsters from your hand or field as Fusion Materials. If a face-up "Cubic" monster is destroyed by battle or leaves the field: You can banish this card from your Graveyard; Special Summon 1 Level 4 or lower "Cubic" monster from your hand or Deck, ignoring its Summoning conditions, and if you do, it cannot be destroyed by battle or card effects this turn.