4 Artifact Mutation Saprolingification One-for-one artifact removal isn't usually the best use of a slot in your Commander decks, but Artifact Mutation makes the cut by converting the artifact you destroy into 1/1 tokens
As for the loose ungraded examples turning up on Mercari, although likely authentic I personally would not go near them (especially without any kind of watertight provenance)
[6] Again, Imakunis sense of humor applies to the cards moves, too
Just check out Paul Rietzls Rock deck from four years later: Creatures (16) Lands (22) Spells (22) 1 Umezawa's Jitte 4 Hymn to Tourach 2 Duress 1 Diabolic Edict 4 Dark Ritual 4 Sinkhole 2 Snuff Out 4 Thoughtseize Sideboard Still four Nantuko Shades, still four Hypnotics, and still four Sinkholes
Number 4: Nim Deathmantle Nothing is quite as much fun or as powerful as abusing Enters the Battlefield triggers in EDH
Whispers in particular have the new ability Boost x that can be used once per turn to place a card from the top of the Player deck beneath the Whisper character for a cost of 1 to 3 Ink