His +2 ability untaps two target lands (totally not broken when paired with Badgermole Cub), while his -3 creates a 4/4 green Beast creature token with Trample
The Aether Heart is a one-shot effect, but that effect is what might be the 7 most powerful worlds in Magic, Take an extra turn after this one. And just like the Marvel, it can sit around on the board for a while while generating energy, making using that effect far easier
It combines all 3 of the original Harpie Ladies in one epic looking artwork, and the Harpie ladies truly look their most menacing in this artwork
Sindbad (T1, S) OK, I hear my audience saying, Why is a marginal creature which hasn't seen play since Fourth Edition sitting on this list
A popular trick across formats is to cheat it into play alongside another threat using cards like Tooth and Nail or Indomitable Creativity to end games right then and there