Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.),
haste (This creature can attack, and as soon as it comes under your control.)
Whenever Scalesoul Gnome deals combat damage to a player,
discover X
(Exile cards from the top of your library until you exile a nonland card with mana value X or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.), where X is that damage.
Whenever you play a card from exile,
conjure (A conjured card is added to the game.) a duplicate of it into your hand.