I created this deck under the assumption that Marik starts the duel with the Sphere mode skill.
Objective is to get both Massivemorph and Kiseitai ASAP. Ra’s effect can’t 🔥 Kiseitai while in the back row. Then stall until the last turn.
Last turn, fusion summon Thunder Dragon, then tribute it to summon Catapult Turtle. Activate Soul Exchange on a 20K+ Ra, then win. Will require 5 glossies, even with tribute and fusion points, because of the obscene LP you’ll end with.
I think it's too early for us to build a deck for the event since we've yet to know what cards he will use. But still, you come up with a nice deck, dude.
Remember spheare gets ra on to the field with 4000 atk points and ras effect that allows him to pay 1000 life points to destroy one card on the field could end up 🔥ing this deck unless you get kiseitai and 3 spell traps face down including massivemorph and if that massivemorph is the only card he does destry other than that good deck