Koffing

When Koffing enters the battlefield, each player
loses 3 life. Then, if any player has 10 or less life,
you may sacrifice Koffing. If you do, search your
hand and library for a card named Weezing, and
place it in the battlefield.
Shuffle your library afterwards.
Its thin, filmy body is filled with gases that cause
constant sniffles, coughs, and teary eyes.
-Pokedex entry