Once you announce that you're casting a spell or activating an ability, no player may take other actions until the spell or ability has been paid for. Notably, players can't try to tap your lands to stop you from paying.
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.
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Jonas De Ro2018-03-16
