- Black metal dragon is nearly full combo you just need 1 extender which sucks but there are 19 cards that can be that extender as well as 4 cards that can serve as near full combo, just 1 XYZ on the end boards.
Here’s the combo (sorry I’m not a duelingbook pro)
https://www.duelingbook.com/replay?id=292787-22000399
Dragoon is the backup plan so we have several cards that either serve as an extender to a normal summon or are 1 card anacondas on their own. Being able to fusion summon him allows a cherry on the top to the end of a combo or the setup for the dark magician grind game.
Where Arf Thou? might be the second best card in the deck. It can search a black metal, it can search a hand trap, it can search souls... it’s just so much fun in this deck. The level 1 hand traps are so versatile and they can be easily sided depending on the matchup of which is more powerful.