If you have no cards in hand when Rotting Regisaur’s triggered ability resolves, you simply don’t discard any cards. There’s no penalty for being unable to do so.
12-07-2019
wotc
Because the upkeep step is before the draw step, you discard for Rotting Regisaur’s triggered ability before you draw a card for your turn.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
Randy Vargas2019-07-12
