While Tyranid Swarm certainly includes old staples like Sol Ring, Cultivate and Farseek, it also brings with it a package of new ramp pieces for the format
If you want Charizard, go for the Charizard packs

Syr Armont, the Redeemer | Commander | Mark Wischkaemper Commander (1) 1 Syr Armont, the Redeemer Creatures (24) 1 Argothian Enchantress 1 Composer of Spring 1 Dawnhart Geist 1 Destiny Spinner 1 Elvish Archivist 1 Flutterfox 1 Generous Visitor 1 Hero of Iroas 1 Jukai Naturalist 1 Kor Spiritdancer 1 Leafcrown Dryad 1 Mesa Enchantress 1 Nessian Wanderer 1 Qasali Pridemage 1 Regal Bunnicorn 1 Satyr Enchanter 1 Slumbering Keepguard 1 Spellbook Vendor 1 Sram, Senior Edificer 1 Sythis, Harvest's Hand 1 Tanglespan Lookout 1 Timber Paladin 1 Transcendent Envoy 1 Unassuming Sage Sorceries (4) 1 Cultivate 1 Kodama's Reach 1 Return from the Wilds 1 Winds of Rath Enchantments (24) 1 Banishing Light 1 Cast Out 1 Celestial Mantle 1 Chains of Custody 1 Colossification 1 Eldrazi Conscription 1 Epic Proportions 1 Giant Inheritance 1 Grasp of Fate 1 In the Trenches 1 Indrik Umbra 1 Mammoth Umbra 1 Mantle of the Ancients 1 Mythic Proportions 1 Nature's Embrace 1 Oblivion Ring 1 Pollenbright Wings 1 Prodigious Growth 1 Quarantine Field 1 Seal from Existence 1 Shape of the Wiitigo 1 Spectra Ward 1 Verdant Embrace 1 Wurmweaver Coil The point, really, is to think about ramp holistically rather than just "run the most efficient ramp there is"

Why Isnt Sol Ring on the Game Changer List
With all these different card options, strategies, and deck options, your opponents will probably be keeping those Goyfs in the trade binder for a while