I stood up and left, not picking the game back up again until after Covid hit
The only thing that the other player or players can do is to ask a judge to examine the player's hand, if in a tournament setting, or if in a casual setting either simply trust the other player or ask an impartial third party
2019-05-03 If a loyalty ability of a planeswalker references the card its printed on by name, treat Nicol Bolass instance of that ability as though it referenced Nicol Bolas, Dragon-God by name instead
1 Leatherhead, Swamp Stalker Legendary Creature One of two Leatherhead cards revealed, the Swamp Stalker legendary creature is going to be huge against artifact and enchantment-heavy decks when played right
A serialized card is a variant distinguished by a unique, printed number (e.g., 001/500) that identifies its specific place in a limited print run
Master Ball Mirror cards