When a Fusion Monster(s) is destroyed by a card effect and sent to the Graveyard: Its owner targets 1 Fusion Material Monster in their Graveyard that is listed on that Fusion Monster; that player Special Summons that target.
Tested and it worked as of patch 1.4
Use a card like wonder balloons or sword to discard a blue eyes, then use illusionist to summon BEUD and then you can special summon regular blue eyes with this card
Does card effects like the illusionist that bring a fusion monster out for one turn count as being destroyed by card effect? Can you special summon blue eyes ultimate for only one turn then use this effect to special summon blue eyes the turn after?