Its my favorite card of all time
Being able to scry away unwanted cards is also a huge boon for decks that use Scroll Rack and Senseis Divining Top, both of which are cards that white decks commonly use to get decent card selection
(Regular sized for Magic, Pokemon, Race for the Galaxy, Thunderstone, Pandemic, etc.)
Pioneer players are already brewing infinite loops with Nest of Scarabs and Obelisk Spider, where placing -1/-1 counters on your own insects creates more tokens and drains the opponent to death on the spot
Giving your Dragons haste is pretty good by itself, with comparable cardssuch as Fervorusually appearing at three mana
Knight of the Reliquary There are a lot of things that this Knight of the Awesome does incredibly well, and don't forget during this discussion that big nasty casting cost