Then the three-drop enchantment in Black will in your upkeep toss two counters here and then mill that many counters in cards, great over time
Even better, the first spell with flash or instant spells you cast on your opponents turn also gain cascade, letting you gain double the value even when its not your turn
If you run into some actual Egg creatures or Irregular Cohort, you can get two creatures for one card to keep churning through your deck
If the copied creature is a token, Synth Infiltrator copies the original characteristics of that token as stated by the effect that created that token, with the noted exceptions
Fortunately for ramp fans, Final Fantasy is way oversupplied on both huge creatures and the acceleration to help cast them

Anaconda Azorius Herald Bayou Dragonfly Benthic Behemoth Benthic Djinn Blighted Agent Blockade Runner Bog Raiders Bog Smugglers Bog Wraith Bouncing Beebles Bubbling Beebles Bull Hippo Bursting Beebles Canyon Wildcat Cat Warriors Cateran Slaver Cave People Cavern Crawler Cephalid Inkshrouder Cephalid Pathmage Colos Yearling Covert Operative Crafty Pathmage Deep-Sea Kraken Dimir Infiltrator Dirtwater Wraith Dream Prowler Dwarven Nomad Dwarven Warriors Elusive Krasis Emerald Oryx Erhnam Djinn Escape Artist Ethereal Usher Farbog Explorer Ferropede Ghastlord of Fugue Glassdust Hulk Goblin Mountaineer Goblin Spelunkers Goblin Tunneler Graxiplon Hada Spy Patrol Harbor Bandit Harbor Serpent Hazy Homunculus Heartwood Treefolk Higure, the Still Wind Hunted Phantasm Hurloon Wrangler Incursion Specialist Inkfathom Infiltrator Invisible Stalker Jhessian Balmgiver Jhessian Infiltrator Keymaster Rogue Latch Seeker Lost Soul Lurking Crocodile Lynx Marsh Boa Merfolk Raiders Merfolk Sovereign Merfolk Spy Metathran Elite Metathran Soldier Minamo Sightbender Mirri, Cat Warrior Mountain Goat Neurok Invisimancer Neurok Spy
