The cost is a bit steep as youll need to keep your Harmonized Trio around and tap two untapped creatures, but I can see it being particularly useful in Izzet spellslinger decks where you need regular small spells
Whereas in real life, all things become crab, in Magic, all things become bird
Now, they have cards like Prey Upon, which let your creatures deal damage to your opponents creatures, allowing removal that way
Aside from stunning artwork with colors that jump right off the card, a 6/6 creature with flying and wither is nothing to scoff at, but being able to copy your spells is another thing altogether
Cards that Synergize with Sheoldred, the Apocalypse: Forces all players to draw seven cards, resulting in significant life loss for opponents while refilling your hand