Top-Decking is the condition where a player is at a large disadvantage, such as having no cards on the field or in their hand, and draws a card that ends up turning the tables in their favor, usually for a game win. The condition is also known by players as the term sacking or luck-sacking, which is usually used in a derogatory manner. The condition is not solely applied to having no cards in the player's hand or on their field; it can also be applied when the player simply has a lot less cards in their hand than their opponent and a much smaller field but draws a card that lets them win.
"Infernity" is the most accused archetype for this act, as the player will always aim never to have a hand, and can easily come back from no matter how bad of a situation while having nothing but one or two cards set, by topdecking an "Infernity Archfiend", "Infernity Necromancer", "Infernity Launcher" or "Infernity Mirage".
"Judgment Dragon", "Infernity Archfiend", "Black Luster Soldier - Envoy of the Beginning", "Pot of Avarice", "Dark Hole", "Monster Reborn", "Evilswarm Kerykeion", "Constellar Sombre" and "Chaos Emperor Dragon - Envoy of the End" can all be considered lucky top-decking cards that turns the duel in one's favor easily, although this is not an exhaustive list.