Losing those stellar cards is a huge hit to take, but it is possible that a midrange Legacy deck could arise that minimizes its own vulnerability to Blood Sun while incorporating it as a maindeck hammer to drop on Lands (as well as the traditional midrange decks)
The uncounterability matters sometimes, especially if you've got a strong elf commander worth jamming through countermagic
Whenever another creature enters the battlefield, Rampaging Ferocidon deals 1 damage to that creature's controller
Enter Repulse, which does multiple things, all while drawing us a card
Nihiloor is a mindflayer who appears in Waterdeep: Dragon Heist , working for the beholder Xanathar
Plus, messing with creatures abilities at instant speed for only 2 mana is very strong, as is saving one of your creatures