Notes & Combos
Powerful. Adaptive. Plays on your Opponent's Turn. Everything you Need.
Intro:
Megalith is a strong and affordable option for the ritual event, Aaratron being the only in-archetype SR, run comfortably at two. With this build I was able to max out the event in 1 & 1/2 days, and with some familiarity, so might you.
Key Notes / Ratio Reasonings:
- Extra Deck: You only need 1 Arc Light, 1+ Dyna Mondo, and 1 Nephthys. Rest is optional filler. Try to run 15 incase your opponent is on Alba Zoa.
- 2 Lava Golems: Megalith is consistant enough to not need it's turn one normal. Obviously it helps, but I'd often prefer the benefit of turning off my opponent's board. If you don't want to give up the normal, run a couple Gameceil instead. Feel free to tribute it off to summon a Megalith, or even use Unformed to get Ophiel from deck.
- Impactation Ratios: Addressing the elephant in the room, no, I don't think Candoll or the impcan. ritual spell should be included in a pure Megalith list. Candoll needs a ritual in hand otherwise its a dead card, as we would not be running any due to Megalith's gimmick, it becomes far too bricky. Instead, I choose to run doulbe Talismanda.
- 5 (7) Normals Summons?: Diviner, Senju, & triple Manju are more than enough to comfortably see a normal summon on your opening draw. As we sometimes don't even need it, the Occassional Lava Golem can be great to. If you find that to be overkill, feel free to replace a few with more handtraps.
Matchup Notes:
- Nouvelles: Honestly, one of the harder matchups. A good Ash / Lava Golem stops them cold. When that's not an option, I've found the best way to deal with them is honestly to summon spam as many bodies onto the field as possible. Keep trying to target/crash into their cascading dudes until they get to the level 5/6's and let them field nuke. After, try to build up your board and field to nuke them back on the next turn using Phul/Emergence, and Bethor, etc.
- Mikanko: Going first, set up Phul, Emergence, and one to two more bodies. They will Lava Golem / Kaiju you. Use Emergence to bring back Phul. Use Phul to summon Bethor to wipe their back row. Going second, they're bad. Just win.
- Blue-Eyes: Jet is the only hurdle for Megalith. Tribute it, Dyna, or scoop.
- Rescue-Ace: Do whatever you can to get to Nephthys. When made using 3 rituals it becomes a 4800 untargetable, unkillable beatstick. Unless they draw a Kaiju they are unable to deal with it.

Unnecessary is a good way to put it. It's fine, and you can totally run it if you want, but it's more of a garnet/win more card IMO. It's a good option to search off Hagith if you already have access to Emergence. It's awful however if you hard open it instead of say, any other monster. Any spell that doesn't immediately give you benefit is a hard sell in a ritual deck where you need bodies more than anything.

I see. What about Odd-Eyes Gravity Dragon? This card is very good to remove backrow, especially against Mikanko

People have experimented with slotting in an out of archetype ritual monster in the past. Gravity Dragon, Riot Dragon, the Shinobarons, Armophactor Pain, Cyber Angel Natasha, and Nekroz Unicore are all fine inclusions. The effectiveness of some of them may be less so due to the event's inherent limitations. If you do decide to run any of these, I'd also recommend 1 copy of Megalith Och so you could theoretically summon them on your opponent's turn.

What is your endboard usually looks like? Mine is Phul, Aratron, and Set Emergence. If I have to play Och, that would means I have to replace Aratron with Och and have Odd-Eyes in my hand.