Its a big, evasive demon, it gives you a strong reason to have demons around, and it replaces itself, among other things
9 Scepter Of Arendelle Command Your Forces The Scepter of Arendelle is a Sapphire Item card that can be kept on the field until your opponent can banish it
White shows up through efficient removal, scalable creature engines, and Angels that close games
Just as many players initially wanted to play just three Necropotence (it gets worse in multiples), players were constantly running lists with three Demonic Consultations, despite how powerfully it pulled everything together
And you can play it at instant speed - you can hold up mana and cast this just before your turn, leaving your opponents with nothing to defend themselves