The Wind Crystal Not all white decks want The Wind Crystal but any that have a reasonable amount of lifegain, or spells beyond four mana really take off with this legendary artifact
It's another free sacrifice effect and can become a major threat quite quickly
That said, there should be other threads you'll find, pointing you towards history further back in time, such as this one that has been suggested in the comments
Gol.D.Roger (Manga) $3,573.98 Set: Emperors in the New World OP-09 Card Number: OP09-118 Rarity: Secret Rare The Breakdown: The man who started it all
Also, most of the reactive cards are cheap, removal and countermagic are common targets for these kinds of cards and this misses far too many of those
Not only does [c]Dawn of Hope[/c] achieve this, but it also creates some tokens with lifelink if youre running out of ways to gain life