when i tested it i had another problem; i got the vapor out and all was good... until she just when from nothing to Yubel - The Ultimate Nightmare and died two turns later only needed 3 more turns :(
the ONLY reason why i lose with this deck i don't draw one of my two mask (i have been unable to get the 3rd :( )this deck is perfect though doesn't die to Tribute to the Doom, sure ultimate Providence can stop you but its quick play. so you wait for tribute or dark hole THEN use it its unlikely they have two spells in hand. and you ONLY need one Vapor on the field DON'T SUMMON ANY MORE afterwards
and to beat Yubel Ultimate Nightmare that dark core is there (i run two DUE to not having 3 masks) but yer very good deck. its even better due to it DOESN'T need a skill :) (im trying to get restart but its really NOT needed if you summon ocean in attack it stops "MOST" stuff for a little while)