Notes & Combos
Dark Gaia OTK baby, I've been playing it for over 10 years but this is the first Master Duel event where it's really been playable/viable. This deck just blinds 2nd and hits hard. This event has very few negates so you can maximize main deck consistency. Dugares is the MVP of your Extra, I stole plenty of wins off doubling Dark Gaia's ATK with his effect.
Being able to main deck triple Maxx C and triple Nibiru (it's a fusion target for Dark Gaia) helps you survive if you're forced to go 1st or open a bad hand which let's you OTK on the crackback. A Hero Lives lowers your LP so Megamorph becomes active which will double your Dark Gaia's ATK and Stratos can search itself to normal summon for the Honest Neos /Evil Hero search.
Double Stratos lets you go for the Dugares play and searches Honest Neos if you need the extra DMG to close out a game. Also, remember Lord of Heavenly Prison can summon itself from the hand by just setting a Spell before you activate it.
As for the Extra Deck, I only ever summoned 2 Dark Gaia, never the 3rd. Knightmare Phoenix and Utopia the Lightning came up exactly once each in about 14 games. The rest of the ED never came up