1 Pendulum Monster + 1 LIGHT Monster Must first be either Fusion Summoned, or Special Summoned by sending the above cards you control to the Graveyard (in which case you do not use "Polymerization"), and cannot be Special Summoned by other ways
It's likely that you will need an Extra Deck to hold a variety of special summon monsters
Of course, it is equally difficult because it requires a lot of preparation, starting with filling the conditions for summoning GBHunter in advance with 2 cards of Blue Sky Lightning + Zushin's hand
This monster, Summonable using any 2 Level 8 monsters, not only has the capability to obliterate all other monsters on the field when Xyz Summoned but post that, it also targets a Spell or Trap Card for destruction while simultaneously bolstering its ATK
It's still going strong on Master Duel though, using little Rokket monsters to get started, building up to terrifying link threats like Borrelend Dragon - which can wipe a board, grab you another Rokket, and is a nightmare for your opponent to remove