Astral Slide Premodern Gameplay (This deck is good, I'm not)

Today I tried to figure out a deck that won a 63 person tournament. I do a pretty bad job! Mainboard (60): 1 Auramancer 2 Avalanche Riders 3 Eternal Dragon 2 Exalted Angel 1 Siege-Gang Commander 4 Renewed Faith 4 Spark Spray 4 Swords to Plowshares 3 Decree of Justice 2 Slice and Dice 2 Wrath of God 2 Astral Slide 4 Lightning Rift 2 Seal of Cleansing 4 Battlefield Forge 4 Forgotten Cave 5 Mountain 7 Plains 4 Secluded Steppe Sideboard (15): 1 Aura of Silence 1 Circle of Protection: Red 1 Cursed Totem 1 Gaea's Blessing 1 Humility 2 Pyroblast 1 Red Elemental Blast 1 Rune of Protection: Red 1 Sacred Ground 1 Seal of Cleansing 2 Spiritual Focus 2 Tormod's Crypt 00:00 Intro 01:20 Match 1 Game 1 22:53 Match 1 Game 2