mtg starter commander deck Magic: The Gathering Bundle – Includes All 5 Decks introducing someone to the game Starter Commander Deck - Etsy

The Demon costs six Black mana to cast, but is a 6/6 with Flying

That's great

This Mint 10 condition copy from the Unlimited print run sold via Heritage Auctions for $16,800 on May 16, 2019

Urzas ability works well in Humans, as the activated ability uses strictly colorless mana, and while the ability does cost five mana, Aether Vial can be used to help pay that cost, meaning Humans has 23 mana sources to activate the ability if you count fifteen non-Ancient Ziggurat Lands, four Noble Hierarchs, and four Aether Vials

He seems like a red version of Liliana of the Dark Realms, a Swamp fetcher and destroyer equal to your Swamp count that was also a four drop

It's great, but you need to run it in the right deck, not every deck can get cards into the graveyard and some want to save them for reanimation like Living Death or recursion like Eternal Witness