
Whenever another nontoken creature you control enters, investigateinvestigateCreate a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.".
, Sacrifice X Clues: Target opponent reveals the top X cards of their library. You may put a nonland permanent card with mana valuemana valueThe total amount of mana in a card's cost, ignoring colour. A card costing
has mana value 4. X counts as 0 except on the stack. X or less from among them onto the battlefield under your control. That player puts the rest on the bottom of their library in a random order.
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.