Conspiracy Unraveler

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 a spell has an additional cost that includes collecting evidence, such as that of Analyze the Pollen, any additional effects that occur "if evidence was collected" will occur only if that additional cost was paid. Using the alternative cost from Conspiracy Unraveler will not cause those additional effects to occur.

If a spell has X generic mana in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.