They let you flex your deck-building muscles, while also building for a powerful payoff
This monstrous card has some of the best protection in the game, having protection from quite literally everything
This means that black decks can access spells and abilities that put cards from your graveyard directly into play, often completely circumventing egregious mana costs
These did not change the core Ascended Heroes card list, but they added more sealed product into circulation
Kuja, Mage Manufacturer Mostly just a 4/5 for tough colors, though I suppose if you have the nut wizard deck, Inalla, Archmage Ritualist could kill pretty fast
The major weakness of the Gengar ex deck: You must get Gengar into play first, which is not so easy due to its Stage-2 evolution