Shadowverse

Before the nerf, the Sabre was used in almost every deck, now it appears occasionally, and Belphegor never drove aggro decks. Catacombs and Orpheus carried aggro decks before the balance master took control of the crafting; moreover, Catacombs can still be used in aggro decks (although aggro decks are garbage), while the balance master will be overkill.
The same goes for Lyria and, to a lesser extent, the Carrot Emperor, who were and are being countered by almost everyone, except for Dis and the Roach.
Many still consider Khavy to be in the "legendary-tier silvers" category, but he shone in the Oil League, and the Oil League didn't shine for long, unfortunately.