He was talking about the cards discarded to Dack, not Dack itself.

If this guy was a 1U 3/1 creature that read "When this enters the battlefield, you may search your library for a instant or sorcery card with a converted mana cost of 1 or less" people would be going apeshit and talking about what an awesome card it was and how they can't wait to jam four of them in their decks.  Just saying...

/blue control bias

EDIT: OK, that's a little drive-by and snarky, but the reality is that Wizards isn't going to print an Ancestral/Necropotence power level type card.

I like the Legacy list.  I'm curious, though, what the Petals in the board are for.