Drake Whelp

{2}{u}{u}, Reveal Drake Whelp from you hand: Mature Drake Whelp. Activate this ability only
during your turn. (To mature Drake Whelp, exile
it. If you do, search your library for a non-Young creature card that shares a creature type with it. You may cast it by paying the difference in mana costs between it and this creature. Shuffle your library.)
Whenever Drake Whelp deals combat
damage to a player, you may draw a card
and mature it.