Call the Skybreaker [Commander 2015] Bolas Set: World Superstars Card type:

Set: World Superstars Card type: Xyz/Effect Monster Rarity: Super Rare Attack: 2300 Defense: 1600 2 Level 4 monsters Once per turn: You can attach 1 "Battlin' Boxer" monster from your hand or Graveyard to this card as an Xyz Material

if all the monsters that were used for the Synchro Summon of that monster are in your Graveyard

-From the Tales of the Noble Knights

using monsters from your hand or field as Fusion Materials

Set: Diamond & Pearl: Stormfront Type: Grass Rarity: Common Retreat cost: Colorless

Call the Skybreaker [Commander 2015] Bolas Set: World Superstars Card type:Set: Commander 2015 Type: Sorcery Rarity: Rare Cost: {5}{U R}{U R} Create a 5 5 blue and red Elemental creature token with flying. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.) It hears and answers every orison across Shadowmoor.