The lot, graded by CGC, has four days remaining at Hertiage Auctions
You'll need to play it mostly midrange, by getting a creature like Alrund out and hopefully controlling the game long enough for it to get big, or long enough to pull off a Mystic Reflection combo to help bring the game to a close
Its irreplaceable

Abu Ja'far Akroma's Vengeance Austere Command Avenge Awaken the Maelstrom Battering Ram Begin Anew Breaking Point Catastrophe Ceaseless Conflict Citywide Bust Cleanse Cleansing Nova Cloud's Limit Break Cockatrice Damning Verdict Day of Judgment Decree of Annihilation Defiant Vanguard Depopulate Desolation Giant Devastation Don't Move Doomskar Dusk // Dawn Elspeth, Sun's Champion End Hostilities Expel the Interlopers Fated Clash Fated Retribution Fell the Mighty Fight to the Death Final Showdown Fumigate Giant Albatross Gideon Jura Glyph of Reincarnation Goblin Pyromancer Guan Yu's 1,000-Li March Harsh Mercy Hearth Charm Heat Stroke Hour of Reckoning Indrik Umbra Infinite Authority Isle of Vesuva Join Shields Jokulhaups Kirtar's Wrath Kjeldoran Frostbeast Localized Destruction Mageta the Lion Magus of the Disk March of Souls Martial Coup Mass Calcify Mogg Infestation Myojin of Cleansing Fire Myr Matrix Nevinyrral's Disk No Witnesses Novablast Wurm Obliterate Organic Extinction Phyrexian Rebirth Planar Collapse Planar Outburst Planewide Disaster Puppet's Verdict Raiding Party Realm-Cloaked Giant

Once they defeat it, the entire forest is petrified and the party can no longer return
Again, quite efficient card draw, although nowhere on par with many future spells