SLD: The Fourteenth Doctor D&D Accessories ) Whenever a creature token

) Whenever a creature token you control enters

You may reveal that card and put it into your hand

a deck box

Players can't pay life or sacrifice creatures to cast spells or activate abilities

SLD: The Fourteenth Doctor D&D Accessories ) Whenever a creature tokenWhen you cast this spell, reveal the top fourteen cards of your library. Put all Doctor cards revealed this way into your graveyard and the rest on the bottom of your library in a random order. You may have The Fourteenth Doctor enter as a copy of a Doctor card in your graveyard that was put there from your library this turn. If you do, it gains haste until end of turn.