If any player runs out of cards in their deck and cant draw, they lose
The trick is that when we play the second copy of The Jolly Balloon Man, we'll legend rule (and make a copy with Ratadrabik of Urborg) and keep the untapped copy on the battlefield, which we can tap with Relic of Legends to make a mana, to activate the Ratadrabik token copy of The Jolly Balloon Man, to copy the legendary version and repeat the process, giving us an infinitely big board of 2/2 hasty red Zombie Balloon Tokens to win the game
Once per turn: You can destroy 1 monster on the field that was Special Summoned from the Extra Deck
Bibarel s Industrious Incisors is an extremely potent, repeatable draw option that, paired with hand-thinning cards like Ultra Ball, means a deck that makes use of it can draw quite a few of cards each turn, without even using a Supporter card
Needless to say, the game will last a while, especially if the player is an actual duelist, since I am sure they will use the game to try out different combinations and decks for the meta game