Memory issues, comical power level (), and on top of it all they decided to let you run it in the command zone. While most of the MTG community has been jubilant in response to Nadu, Winged Wisdoms well-deserved demise, a subset of players feel that this ban should have been enacted sooner
5 Eldrazi Incursion Six-Color Eldrazi While Eldrazi has had a precon before, Eldrazi Incursion is the only six-color precon in Commander
Equip only as a sorcery.) Illustrated by Forrest Imel Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
The deck that did this most famously was Prosperous Bloom, refilling its mana and thinning its deck by combining Squandered Resources with Natural Balance or simply to boost its way to its first Cadaverous Bloom or Prosperity
Empress Galina is also a big fan, as is basically any commander with a nice tap effect
Even though the card does see some play, which well get into shortly, the fact that its a rare from a current Standard set throttles the price somewhat