Madam Mim Fox is an incredible addition to this deck, with all of the exert and Challenger abilities
Then I go the other way. Javad Nasrin, Ondu relic hunter Illustrated by Franz Vohwinkel Standard Legal Alchemy Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
What makes it unique is the deckbuilding rule attached to it: You can run as many copies as you want, something you almost never see outside of cards like Relentless Rats or Shadowborn Apostle
Kelpie Guide Kelpie Guide exists in a similar space to Ley Druid, but its far superior, both for its greater flexibility and because blue just gets this ability less often
Dragon Shields are known for their durability and come in tons of colors, though they are thicker and can make a double-sleeved deck feel massive
Whatnot Whatnot is a little bit different than most platforms, and Ive never engaged with it myself, so Im a little wary to give it a full recommendation