Witchwood Piper already exists in standard, and Paladin never really ran that, so I doubt this would ever see play, since this seems worse than that card, as the stats are delayed a turn, where Witchwood Piper draws a card, and puts a 3/3 in play, for just one more mana.
Not a card that will be included without any bigger plan. An arbitrary 1 drop like Argent Squire turns into a Silvermoon Guardian which never saw competitive play (4 mana 3/3 with divine shield). And other 1 drops are not good enough either. Without 1 drops, it can't really be a midrange or aggro deck and the buff's usefulness seems limited.
As others have said, maybe in a combo deck. Or control to fish Wild Pyromancer out of your deck (although equality would undo the buff anyway). But I can't really think of anything that is low cost and really wants a +2/+2 buff for a 3 mana tempo loss.
Edit: As mentioned above, Immortal Prelate might be a good enough payoff. Although you still can't run 1 drops and maybe not even 2 drops to make drawing the prelate consistent enough. I am still not convinced of this card, but this is at least something...
This card into Stonetusk boar for +2/2. Then Glowstone Technican for +2/2. Then turn 9 Alex, turn 10 Bless of king Boar + faceless manulator for 18 damage, higher if you have any weapon. Kill most non control deck.
Good point! And good thing I randomly saw this since this ghetto website makes you have to choose between replying to someone or quoting them. Wonder how many times people have responded to my post by quoting me and I never saw it because they had to click "quote" instead of "reply". Like WTF seriously???