By opening packs, of course
If there are three on the battlefield, then the number of tokens or counters is eight times the original number, and so on
Note that theres very little of value to tutor up with Primeval Titan (just Adventurer's Inn, Eden, Seat of the Sanctum, and The Gold Saucer)
You can even pull this off in Time Spiral Limited with Dream Stalker
Advanced Search Sets Random Syntax Aberrant Acidic Slime Acidic Slime Ainok Survivalist Airship Crash Appetite for the Unnatural Artisan's Sorrow Atraxa's Fall Break Asunder Break Down Broken Bond Broken Wings Cankerbloom Carnivorous Canopy Caustic Caterpillar Chomping Changeling Cleanup Crew Coliseum Behemoth Collective Resistance Conclave Naturalists Containment Breach Cosmium Confluence Crack Open Creeping Mold Crushing Canopy Desecration Plague Disruptive Stormbrood Drop of Honey Druid Lyrist Druid of Purification Elvish Lyrist Emerald Charm Fade from History Feline Sovereign Filigree Fracture First Pick Flaxen Intruder Flaxen Intruder Foundation Breaker Frenzied Trapbreaker Freyalise, Llanowar's Fury Gemrazer Gemrazer Gleeful Sabotage Green Slime Guerrilla Gorilla Heritage Reclamation Hivespine Wolverine Hulk's Thunderclap Indrik Stomphowler Insidious Fungus It's Clobberin' Time
After resolving the Adventure spell, the card is exiled
