I currently have no ways to actually search for Primal Surge, and I did that on purpose. Tutoring for Primal Surge all the time just got really old and boring to me. It's always more exciting to just top deck and cast it out of nowhere. But if you really want to search for it, you'll have to chain tutor. I used to do: Fierce Empath into Brutalizer Exarch into Hoarding Dragon into Planar Portal or Ring of Three Wishes. Then sacrifice the Hoarding Dragon to High Market or Miren, the Moaning Well that you can find with Expedition Map.
I currently have no ways to actually search for Primal Surge, and I did that on purpose. Tutoring for Primal Surge all the time just got really old and boring to me. It's always more exciting to just top deck and cast it out of nowhere. But if you really want to search for it, you'll have to chain tutor. I used to do:
Fierce Empath into Brutalizer Exarch into Hoarding Dragon into Planar Portal or Ring of Three Wishes. Then sacrifice the Hoarding Dragon to High Market or Miren, the Moaning Well that you can find with Expedition Map.
1 Mayael the Anima
Big Creatures (33)
1 Akroma, Angel of Fury
1 Angel of Serenity
1 Archetype of Endurance
1 Avacyn, Angel of Hope
1 Avenger of Zendikar
1 Balefire Dragon
1 Cyclops of Eternal Fury
1 Deathless Angel
1 Eternal Dragon
1 Gisela, Blade of Goldnight
1 Heliod, God of the Sun
1 Hellkite Tyrant
1 Inferno Titan
1 Iroas, God of Victory
1 Karametra, God of Harvests
1 Krosan Tusker
1 Magmatic Force
1 Novablast Wurm
1 Nylea, God of the Hunt
1 Purphoros, God of the Forge
1 Root Elemental
1 Scourge of Kher Ridges
1 Sigarda, Host of Herons
1 Soul of the Harvest
1 Spearbreaker Behemoth
1 Steel Hellkite
1 Stalking Vengeance
1 Vagrant Plowbeasts
1 Valley Rannet
1 Vorinclex, Voice of Hunger
1 Wirewood Guardian
1 Woodfall Primus
1 Xenagos, God of Revels
1 Burnished Hart
1 Eternal Witness
1 Grand Abolisher
1 Kor Cartographer
1 Ogre Battledriver
1 Oracle of Mul Daya
1 Sakura-Tribe Elder
1 Solemn Simulacrum
1 Wood Elves
1 Yavimaya Dryad
Doe Something About This or Die (1)
1 Primal Surge
Artifacts (6)
1 Chromatic Lantern
1 Deathrender
1 Oblivion Stone
1 Scroll Rack
1 Sensei's Divining Top
1 Sol Ring
Enchantments (6)
1 Goblin Bombardment
1 Mirari's Wake
1 Mirri's Guile
1 Lurking Predators
1 Sylvan Library
1 Warstorm Surge
Planeswalkers (5)
1 Ajani, Mentor of Heroes
1 Domri Rade
1 Elspeth, Sun's Champion
1 Garruk, Caller of Beasts
1 Sarkhan Vol
Nonbasic Lands (24)
1 Brushland
1 Command Tower
1 Fire-Lit Thicket
1 Gruul Turf
1 Homeward Path
1 Karplusan Forest
1 Kessig Wolf Run
1 Krosan Verge
1 Miren, the Moaning Well
1 New Benalia
1 Raging Ravine
1 Rugged Prairie
1 Sacred Foundry
1 Selesnya Sanctuary
1 Slayers' Stronghold
1 Stirring Wildwood
1 Stomping Ground
1 Strip Mine
1 Temple Garden
1 Temple of Abandon
1 Temple of Plenty
1 Temple of Triumph
1 Winding Canyons
1 Wooded Bastion
5 Forest
4 Mountain
5 Plains