To the niche and tribal cards from fringe and Commander decks that have been around for what feels like forever: Ryan Pancoasts Master of the Pearl Trident, Eric Fortunes Mulldrifter, and even Jesper Ejsings Fblthp, the Lost
Europe had a LAN event for their Aeos Cup series at European International Championships
Hexproof was introduced in part because it makes more sense intuitively to cast spells to strengthen the creatures you summon instead of being unable to do so because of their aversion to magic
If you can use it one a 1-cost character, thats pretty good value
You wont trigger effects like whenever you cast a dragon spell when you cast an omen
Inspiring Statuary is another way to leverage Food tokens for casting non-artifact spells (like creatures!), and then theres Seedborn Muse, which just creates huge mana value if you can keep it on the battlefield, which Gyome helps to do