Mazemind Tome
Restricting your deck to only mono-blue spells removes options, but you can funnel all that mana into blue card draw spells to trigger the likes of Psychosis Crawler and Ominous Seas to bury your opponents in card advantage, damage, and triggers
Not only is this Maui a 7/5, but it has the evasive keyword, helping you knock out your opponents evasive characters with a single strike and making it incredibly resilient to attacks
Emrakul and Chatterfang For a long time, Magic players have joked that Emrakul cant be that strong if she can be beat by 15 squirrels
Groundchuck & Dirtbag Groundchuck & Dirtbag is far from the flashiest card to slap in the command zone, but it has a fundamentally green flavor: Its a big creature that enables bigger plays, whether you open a portal to Magics greatest foe or summon eldritch horrors from beyond reality
For a Bracket 3 build, Id be looking to curve out with value creatures that have strong mana and card generating ability, combined with strong attack triggers that Aurelia can come along and double up on