Councils Judgment Councils Judgment, originally printed in Conspiracy , has become a Legacy and Commander staple
Hopefully, the info was helpful to you and youve got a better sense of how to go about collecting and using these cards
Theres no way to know for sure
Disney Lorcana 's fun and unique story actually manages to answer this by having players, known as Illumineers, use magical ink to call forth glimmers of these characters to the table

Abundant Countryside Amoeboid Changeling Avian Changeling Barkform Harvester Belonging Birthing Boughs Black Market Connections Blades of Velis Vel Bloodline Pretender Cairn Wanderer Chameleon Colossus Changeling Berserker Changeling Hero Changeling Outcast Changeling Sentinel Changeling Titan Changeling Wayfinder Chitinous Graspling Chomping Changeling Crib Swap Ego Erasure Faceless Agent Feisty Spikeling Firdoch Core Fire-Belly Changeling Flock Impostor Formless Genesis Game-Trail Changeling Gangly Stompling Ghostly Changeling Gladewalker Ritualist Graveshifter Guardian Gladewalker Impostor of the Sixth Pride Irregular Cohort Littjara Littjara Glade-Warden Littjara Kinseekers Masked Vandal Maskwood Nexus Mirror Entity Mischievous Sneakling Mistwalker Moonglove Changeling Moritte of the Frost Morophon, the Boundless Mothdust Changeling Mutable Explorer Nameless Inversion Oddric, Lunar Marquis (playtest) Omni-Changeling Omnipresent Impostor (playtest) Orvar, the All-Form Personify Prideful Feastling Realmwalker Rooftop Percher Shapesharer Shields of Velis Vel Sizzling Changeling Skeletal Changeling Springleaf Parade Stalactite Dagger Taurean Mauler The Bears of Littjara Three Tree Mascot Turtleshell Changeling Universal Automaton Unsettled Mariner Valiant Changeling Venomous Changeling War-Spike Changeling

For this reason, I dont feel like you should go below 20 Humans in your Sigarda deck, and if anything, Id want to be looking at closer to 25, if at all possible