One friend, David Dibs Sisson, who now owns his own LGS (Underworld Games), recalled playing for ante with his friends because they thought it was part of the rules
Here are concrete approaches adapted to each level of investment, with targeted product examples
This can be an incredibly inconvenient tax, causing utility artifacts and mana rocks to cost additional mana, reliably slowing opponents down as early as turn two
Deserted Temple Deserted Temple from Odyssey can tap to provide one colorless mana or can untap a target land via the cost of paying one mana of any color and tapping it
Special Summon 1 "Watt" monster with a different name from your Deck, then you lose LP equal to the Special Summoned monster's ATK, also you cannot Special Summon for the rest of this turn, except Thunder monsters