personalized hotel room key card sleeves Sleeve w/Your Logo Hotel Key Card Sleeves (2-3/8"

Now, you have to play by his rules if you want in

If a face-up "Aroma" monster you control is destroyed by battle or card effect and sent to the Graveyard: Gain 1000 LP

Mathmech Circular can special summon itself by sending any Mathmech monster from your deck to the graveyard, and if a Mathmech monster is special summoned to your side of the field while its face-up on the field, then you can add any Mathmech spell or trap card to your hand

Championship Series event risk penalties including disqualification and expulsion from the venue

They are not a one-and-done activity

I agree with most of the core card choices (but not all)