Overvaluing the condition The condition of a Magic card is very important to many collectors
Ayli wants you to play ones with large toughness, enabling easy Lifegain
You need more of a plan

3 Blazing Hellhound Blood Cultist Bloodhall Priest Bloodtithe Harvester Body Dropper Boggart Cursecrafter Boltwing Marauder Brawl-Bash Ogre Bullseye, Death Dealer Carnage Gladiator Carnage, Crimson Chaos Carnival Hellsteed Chainer, Nightmare Adept Chaos Spewer Chaos, the Endless Charforger Cindering Cutthroat Coalstoke Gearhulk Crash, Reckless Endrider Cruel Administrator Cryptborn Horror Cult Guildmage Cultbrand Cinder Deathbringer Thoctar Deepfire Elemental Defiler of Souls Demigod of Revenge Desecrex, Gift of Servitude Dire Fleet Captain Dire Fleet Neckbreaker Dire Fleet Warmonger Dragonlord Kolaghan Dread Slag Dreadhorde Butcher Dust Stalker Eclipsed Boggart Elite Headhunter Emberstrike Duo Exava, Rakdos Blood Witch Falkenrath Aristocrat Far Fortune, End Boss Fireblade Artist Fireglass Mentor Flayer Drone Florian, Voldaren Scion Footlight Fiend Forerunner of Slaughter Forge Boss Fulminator Mage Garland, Knight of Cornelia Garna, Bloodfist of Keld Garna, the Bloodflame Gastal Thrillseeker Gev, Scaled Scorch Ghostflame Sliver Glistening Goremonger Gobhobbler Rats Goblin Deathraiders Goblin Outlander

You can identify the rarity by the symbols at the bottom of the card, with Common cards featuring a gray circle and Enchanted cards bearing a multicolored hexagon