As you can imagine, these labels are often based on the relatively scarcity of the card, in addition to the power of the card
Wargear is at its best in agro black and/or red decks where you have either recursive dorks and card draw from black or ideal one shot creatures like Hellspark Elemental in red
Azami, Lady of Scrolls This is probably the starting point for any player that wants to build a wizard Commander deck, either as part of the 99 or as a commander
Honorable Mentions: Darkpact + Timmerian Fiends + Tempest Efreet Three cards that mention exchanging control of cards are banned in all formats for their references to ante, a now-defunct mechanic that asked players to wager the cards from their libraries in games of Magic
"They're Off on the (Animated) Road to El Dorado"
I picked this piece to win in my Chesley Critics Choice last year, and what I said then rings truer now than ever