When this creature enters, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Draw three cards, then put two cards from your hand on top of your library in any order.

Draw a card. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Target player draws two cards. Flashback—{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Draw three cards. Islandcycling {1} ({1}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)

Mill two cards. Draw a card.

Counter target spell.

This spell costs {1} less to cast for each card you've drawn this turn. The owner of target nonland permanent puts it into their library second from the top or on the bottom.

Target creature can't be blocked this turn. Flashback {U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.