Hearthpwn

The confusion stems from the fact that this is the first card that gives a stat or effect that isn't pre-determined. All of the other "Give X" cards in the game say "1 health" or "+4/+4", for example. This card is worded in such a way that it can give another minion stats based on potential attack buffs. So vanilla, it's just "Give a random minion +2 Attack", but if you were to buff it, that number goes up.