Even mono color commanders can make this excuse to enjoy fetch lands in their deck Fetch Lands in Modern, Legacy, Commander, Cube, and More There are multiple uses of fetch lands in theory, but how useful are they in practice
It's pretty useful in decks that want sacrificing to occur but, aside from that, I don't know how powerful this ability is
They knew that Mono-Red, the only deck that could really compete with Cauldron, would just become the new bully
If you discard a card while you control Hades, Sorcerer of Eld, abilities that function when a card is discarded (such as madness) still work, even though that card never reaches your graveyard
Dragonite and Gengar appear as both Special Art Rares and Mega Ultra Rares, giving you plenty of valuable Japanese cards in whichever style you prefer.