mtg retard card R&D's Secret Lair just received a massive power upgrade thanks to Wheel of Potential. (For all fans of silver-bordered Magic.) MRM FR/VF Retard - Delay

All still provide one of the most efficient and immediate returns on cards for the mana and still see occasional use but with most decks being more traditional agro, midrange and control these cards are too risky and too symmetrical to be appropriate very often

However, the populated army token won't automatically gain +1/+1 counters, so you'd need an anthem or some other way to give it toughness or it dies immediately

dangerous but conflicted

Even though Im not sure being a tapper is all that relevant in a game of Commander, you do get a Clue token when you do it, so its always going to be useful

Just look at Nadu, Winged Wisdom, who got itself banned in Commander

Hes a sacrifice outlet, a removal engine, and a draw spell in one slot