Hello there, Labrynth player. Here’s the deck I’m currently using; I’m quite happy with it, as it has a win rate of over 65% across more than 50 games.
This deck is quite tricky to get to grips with, hence this guide. When you start the duel, try to have “Welcome” + “Big Welcome” or “Lady Labrynth” + “Welcome”/“Big Welcome” in your opening hand. If these conditions are met, on the next turn after your opponent has revealed their hand, activate “Welcome”/“Big Welcome” and follow up with “Lady”. Set the appropriate traps based on your opponent’s deck using “Lady”’s effect, then “Welcome”/“Big Welcome” summons “Arianna”, who will fetch Cooclock.
Next, to keep the game going for longer, during your turn, if you activate a trap effect, use Lady to set "Trap Holic". That way, during your opponent’s turn, you’ll set "Transaction Rollback". Destroy "Transaction Rollback" using the effect of "Trap Holic".
Dracotail traps are there solely to help you win long games thanks to their disruption and card-drawing effects.
Even though Master Duel doesn’t have a side deck, these cards are there to provide support depending on the decks you commonly face.