リヴァー・ソング

逆行の出会い — あなたはライブラリーの一番上ではなく一番下からカードを引く。
ネタバレ — 対戦相手１人が占術や諜報を行うか自分のライブラリーから探すたび、リヴァー・ソングの上に＋１/＋１カウンター１個を置く。その後、リヴァー・ソングはそのプレイヤーに、これのパワーに等しい点数のダメージを与える。

River Song

Meet in Reverse — You draw cards from the bottom of your library rather than the top.
Spoilers — Whenever an opponent scries, surveils, or searches their library, put a +1/+1 counter on River Song. Then River Song deals damage to that player equal to its power.

Doctor Who

Drawing cards from the bottom of your library is exactly the same as drawing from the top, except that you take the bottom card of your library and put it into your hand.

If an effect instructs you to choose a creature type, you may choose Time Lord.

Neither "Time" nor "Lord" are creature types. Some older cards were printed with the subtype "Lord," but all of those cards have updated Oracle card text that removed that type.

River Song's first ability applies to all cards you draw while it is on the battlefield, not just the card you draw for your turn.

Unlike other creature types in Magic that are each only one word, the two words "Time Lord" represent a single creature subtype. Time Lord is the only two-word creature type.