If your Marco is KO'd, you can bring him back to the board in rest mode by sacrificing a "Whitebeard Pirate" character from your hand (and normally, with this decklist, you'll have several in hand)
I also lost like a dozen games I didn't record against Burning Abyss
Also consider some of the more esoteric ramp options, like Lotus Cobra and Azusa, Lost but Seeking, that support a deck looking to play lots of lands
To trigger this, Mind Shuffle (YGOrg Translation) exists, a Continuous Trap that tutors a monster that mentions Ritual of Light and Darkness then discards a card
The engine helped fill the grave for effects, and it also provided many LIGHT targets for Shaddolls and Chaos monsters
It can draw you a card for essentially three mana when youve attacked with two creatures, something youre probably already doing if you included this card in the deck