This card was crucial to the success of the Gouging Fire ex deck that got a Top 16 spot at the Lille Regional event
This is because in the Japanese Black Bolt and White Flare sets, this card can not be pulled from booster packs at all

We Are Not Worthy | Commander | Stephen Johnson Commander (1) 1 Reidane, God of the Worthy Creatures (19) 1 Alms Collector 1 Eidolon of Rhetoric 1 Giver of Runes 1 Keeper of the Accord 1 Knight of the White Orchid 1 Kor Cartographer 1 Mother of Runes 1 Oreskos Explorer 1 Pilgrim's Eye 1 Resolute Watchdog 1 Selfless Savior 1 Selfless Spirit 1 Serra Ascendant 1 Spirit of the Labyrinth 1 Silent Arbiter 1 Skittering Surveyor 1 Solemn Simulacrum 1 Thalia, Guardian of Thraben 1 Weathered Wayfarer Instants (10) 1 Dispatch 1 Fate Forgotten 1 Generous Gift 1 Invoke the Divine 1 Path to Exile 1 Return to Dust 1 Settle the Wreckage 1 Silence 1 Swords to Plowshares 1 Teferi's Protection Sorceries (8) 1 Approach of the Second Sun 1 Austere Command 1 Divine Reckoning 1 Doomskar 1 Fumigate 1 Open the Armory 1 Rout 1 Wrath of God Enchantments (11) 1 All That Glitters 1 Armored Ascension 1 Aura of Silence 1 Authority of the Consuls 1 Blind Obedience 1 Celestial Mantle 1 Ethereal Armor 1 Ghostly Prison 1 Land Tax 1 Smothering Tithe 1 Sphere of Safety The only thing I've got real second thoughts about is the lack of Swiftfoot Boots and Lightning Greaves

Ill pick a Top 3 in each color as well as that colors most interesting reprint
Of course the game recommends not going above 50, as adding too many cards will limit the potential of you getting your strongest cards into play
Long story short: Banned in Modern, banned in Legacy, and a very popular card-draw engine in the formats it's still legal in