There are four basic levels of rarity: Common, Uncommon, Rare, and Promo

Synthoids Aminatou, Veil Piercer Ancestral Knowledge Brainstone Brainstorm Brainsurge Broodspinner Candlestick Cavalier of Gales Cephalid Inkmage Cerebral Download Citywatch Sphinx Clandestine Work Consuming Ashes Contingency Plan Corroding Dragonstorm Cruel Truths Curate Dazzling Lights Deadly Visit Diabolic Vision Dimir Informant Diresight Discovery // Dispersal Dogged Detective Don't Make a Sound Doom Whisperer Doomsday Dream Eater Ephara's Dispersal Failed Conversion Fangkeeper's Familiar Found Footage Goblin Recruiter Grim Bauble Grim Flayer Harmonized Trio Hidetsugu and Kairi House Guildmage Imperious Inkmage Jace, the Mind Sculptor Kishla Village Kroble, Envoy of the Bog Lightshell Duo Lim-Dl's Vault Lydia Frye Master of Death Mephitic Vapors Mission Briefing Munda, Ambush Leader Muse's Encouragement Naga Oracle Namazu Trader Neutralize the Guards Notion Rain Orcish Librarian Otherworldly Gaze Pile On Plan the Heist Price of Fame Psychic Whorl Reinforcements Risky Research Riverwise Augur Rowan's Grim Search Rubblebelt Maverick Scroll Rack Spellgyre Spider-Man Noir Starbreach Whale

So, while Animated Army can bring the pain, you have to be very careful not to get wiped out of the game before you can make that happen
This time around, we added the classic green mana dork, the Llanowar Elves, one little Snake that just won't quit with Sakura-Tribe Elder , and one of the most fearsome ramping creatures around, the Primeval Titan
I think the best fodder are ones that replace themselves or have some sort of effect when they enter the battlefield since theyve already provided value coming in, so the body is fine to use going out