Nothing too special but Saryuja effect to draw. Draw Rescue Ferret then Saryuja Effect to summon the Ferret. Shuffle back ferret for Giant Rex, Dotscaper, and Re-Cover. Synchro into Naturia Beast using Rex and Re-Cover, and Linguriboh from the Dotscaper. This takes care of spells and traps gg. Off of Block Dragon's search get 2 copies of Gigantes and summon both of them then summon Gallant Granite then detach 1 to search Block Dragon. This is better than searching Block Dragon off of Block Dragon as it basically is the same thing with a body on board. Feel free to take out the other Cherubini or the Knightmares for some other extra deck options. Generic Rank 4s could go well in their place. You can also play Deskbot 001 in the main deck and have Mecha Phantom Beast Aurodan and Halqifibrax in the extra deck from some more synchro options. The best end board I have gotten is Dingirsu, Zeroboros with 5,000 ATK, Nat Beast, Linguriboh, Fossil Dyna and Levair. This pretty much takes care off all monsters and spells as well as annoying first turn traps like Imperm and Evenly Matched. If anyone has a combo deck similar to this I would love to check it out, Block Dragon Burning Abyss is my favorite deck and probably will stay my favorite deck. I could definitely see this deck making a return if Block Dragon was to go to 2 copies but probably wouldn't work very well if he were to come back to 1. As for O-lion, he probably won't be coming back as long as Halqifibrax is in the game. But he can easily be replaced for a 2nd copy of Rhino Warrior, Edge Imp Sabres, or something of the sort. Anyway that is all I have I hope you like the build!