Notes & Combos
Labrynth wasn't hit that hard by the event save for some consistency tools with the pots, but that just opened room for some fun additions. I have the "new" trap which did come in handy a few times, alongside that I have both Witch's Strike and Boo-Boo but those are optional depending on if you like the meme of it or not and I do (plus Witch's Strike did have a big impact on at least one duel from the streak) so they're there but you could just replace it with some copies of Solemn Judgment on top of Strike that's already there or just increase the count of some of the other normal traps like Evacuation which is one of 2 I have at 1 copy while all the other normal traps are at 2 or more to work with Trap Trick.
I have added a copy of Flying "C" since it basically stops all xyz summons except for stuff like Springans' field spell that just lets them special summon them that doesn't count as xyz summoning so it's not quite as good as Dimensional Barrier.
As for the Extra Deck, it won't really come up that much if ever so it doesn't really matter, I added a single copy of Bagooska and the Arc Rebellion package but other than that you can just add any generic rank 4 monsters that you can summon with 2 Ariannas if you somehow find yourself with both on-field, tho they need to be fiend monsters if you want to summon them after using Welcome Labrynth so that's pretty usual. I didn't add any others because all the actually decent ones I found were SR or higher and I'm not gonna waste any crafting points on that just for the event.
Replays
393-802-173
Replay 1: Rank 8 with Lancelot stall
Replay 2: Exosisters
Replay 3: Numeron
Replay 4: Shark Control?