If you run with a Naturia deck and you have the fusion card Naturia Exterio and the synchros Naturia Beast and Naturia Barkion I suggest adding the spell card Miracle Synchro Fusion. I would suggest that you allow Beast and Barkion to be sent to your Graveyard by your opponent in order to play this card. Now you could use this card while both are on the field but bringing both out at the same time would be difficult, so let’s do this from the Graveyard. Activate Miracle Synchro Fusion and remove (banish) from play Barkion and Beast from the Graveyard in order to fusion summon Exterio and voila! I hope this was helpful. Thank you for reading!