leviathan deck mtg commander All 28 Leviathans in Magic Ranked Creatures without flying or islandwalk cant attack. Serpents, Krakens, Leviathans, Oh My!

You want to cast a lot of spells to make sure Ms

You can use powerful artifact recursion like Scrap Trawler to instantly assemble multi-part engines like the Mirrodin -era Stations or Kaladesh Modules

Red / Green: Expend 4 ( Raccoons ) Expend is fundamentally an aggressive mechanic that encourages you to spend mana, and Wandertale Mentor encapsulates that idea perfectly with a two drop that both taps for mana (allowing you to Expend 4 on turn 3) while also growing bigger to become a scary threat in the late game

In other words, the existence of Expressive Iteration allows Midrange and Control decks to keep hands they would otherwise be forced to mulligan