Playing using a deck master is really easy on DN just remove it from play as soon as you start the duel. If its in your hand when you start remove it and draw another card.
Basic Deck Master Rules
The deck master can be summoned during your main phase or main phase two. If it is removed from the field you lose the duel.
Once per turn you can use the deck master's effect.
Rather than have everybody find new and impossibly broken monsters to use as a deck master dueling_master is having me make a list of all the possible ones you can use.
Lets do it:
Cannon Soldier: tribute and do damage
Royal Magical Library: once per turn you draw another card
Seargent Electro: they cant use the spell or trap you choose until the end phase
Tour Bus From the Underworld: does its thing once per turn
Tragodia: does his thing. Not broken because the risk is high that they can kill it and you need the exact level to take one of your opponents cards. still fun.
Kuriboh: you dont take damage from one attack once per turn. can get annoying but isnt broken.
Gale the Whirlwind: does its thing
Card Trooper: send top three dards of your deck to the grave
Debris Dragon: does its summon thing with all of the downsides
Evil Dragon Ananta: during each of your end phases destroy one card; mandatory. Can backfire. a lot.
Gishki Chain: look at the top 3 cards in your deck and rearrange them in any order
Gravity orb: change the positions of all face-up monsters on the field
Healing Wave Genertor: select a monster on your side of the field and increase your life points by 100x its level.
Mind on air: each player plays with their hand revealed
Patrol Robo: look at a face down card
Scary Moth: only one special summon per turn
Summoner Monk: discard a spell to summon a level four monster from your deck, it cannot attack
Blue-eyes shining dragon: you can summon ignoring summon conditions.
Will have others later but for now this is it