The card fills several valuable roles
From PuPu UFO, Goobbue Gardener and Torgal, A Fine Hound through to Ignis Scientia, Prishes Wanderings, Summon: Fenrir and Blitzball, I cant remember another format with so many ways to ramp at two and three mana
You can even use Zamriels ability to make your board wipes one-sided and keep the battlefield under control
We even had to make sure that we had frames for token battles (which don't exist as printed objects in paper but can be created)
Avacyn herself has indestructible as well, and despite the eight mana cost, she can all but secure you a victory just by being in play
You can also retrieve other Continious Spells like "Valhalla, Hall of the Fallen" or "Constellar Belt" this way or even send Traps like "Lost Wind" and "Rise to Full Height" to the Graveyard to activate their effects