wotc
Once you've announced that you're casting a spell, players can't take actions until you've finished doing so. Notably, opponents can't try to remove cards from your graveyard to stop you from collecting evidence.
Once you've announced that you're casting a spell, players can't take actions until you've finished doing so. Notably, opponents can't try to remove cards from your graveyard to stop you from collecting evidence.
If you can't exile enough cards to meet or exceed the required mana value, you can't choose to collect evidence at all.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Maxime Minard
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.