Pair Perdita, Devoted Mother with some 2 cost characters that have abilities trigger when they enter play like Pinocchio, Talkative Puppet and youve got yourself an effective little recursion engine
With that in mind, if KotoriKotori didn't scratch your Azorius vehicle itch, then maybe give Shorikai a shot instead
Each colour is associated with a strategy: Steel hits hard, Sapphire is slow and strategic, Ruby hits fast but weak, Emerald is about thinking beyond the playing field, Amythest nerfs your opponent and Amber heals and buffs your deck
Freya Crescent Freya Crescent is the Llanowar Elves of equipment decks and a little flier when you need an equipment wielder
For example, if you have 12 cards in your trash and your opponent has 8 cards in theirs, that makes a total of 20 cards, so the play cost is reduced by 8
Morophon, The Boundless Can't find a good bat, wombat, or lhurgoyf commander