Just like Agate Instigator, Rapid Augmenter doubles the potential damage of your token-generating spell

Abyssal Harvester Adagia, Windswept Bastion Adorned Pouncer Altar Ibn-La'Ahad Angel of Sanctions Anikthea, Hand of Erebos Anointer Priest Applied Geometry Arboreal Alliance Arcane Artisan Ardyn, the Usurper Arna Kennerd, Skycaptain Artificer Class Ashling's Command Ashling, the Limitless Assemble from Parts Auton Soldier Aven Initiate Aven Wind Guide Awaken the Maelstrom Back from the Brink Banshee of the Dread Choir Battle for Bretagard Benthic Anomaly Biowaste Blob Blade of Selves Bloodforged Battle-Axe Blue Sun's Twilight Bramble Sovereign Brenard, Ginger Sculptor Brigid's Command Broodbirth Viper Cabaretti Confluence Cackling Counterpart Cadric, Soul Kindler Calamity, Galloping Inferno Calix, Guided by Fate Caller of the Pack Caller of the Untamed Caretaker's Talent Caught in a Parallel Universe Champion of Wits Chandra, Flameshaper Chrome Dome City of Death Clone Legion Cogwork Assembler Coiling Rebirth Colorstorm Stallion Compy Swarm Conclave Evangelist Copy Catchers Corporeal Projection Council of Reeds Coursers' Accord Court of Vantress Croaking Counterpart Cursecloth Wrappings Cybermen Squadron Dalek Squadron Dance of Many Delina, Wild Mage Determined Iteration Dino DNA Dollhouse of Horrors Donatello, Gadget Master Dreadfeast Demon Dreamstealer Druid's Deliverance Dual Nature Duke Ulder Ravengard Dutiful Replicator

Hayes Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
The makeup and card pool of the format changed several times before finally taking what is (more or less) its current form in July 1997 (with one core set and two blocks forming the Standard format)