Holos offer an artistic appeal that full arts mostly do not and when people talk about treating Pokemon cards as pieces of art, this is where I can see it happening
Edges: Check the entire perimeter for whitening or chipping, especially along the coloured border
You can make them out of nowhere to chump block flyers or to trade with X/2 or smaller attacking butts
Renata, Called to the Hunt (Showcase) [Theros Beyond Death] Set: Theros Beyond Death Type: Legendary Enchantment Creature Demigod Rarity: Uncommon
Much of the removal in Modern Horizons is slow or clunky, so having a cheap, disruptive threat that synergizes super well with ninjas and blink while being outstanding by itself makes it a top tier common
Multiple one-drops create Clue tokens, which can be used to either draw a card later in the game or as a way to boost an affinity count