They exist, the rules still support them, but the design space is basically abandoned
That's exactly equivalent to Magic having a card called "Quiet Time" that only affects cards with "Bellowing" in the name
Cards such as Rise of the Dark Realms, Reanimate, and Animate Dead all help to put creatures from any graveyard onto the battlefield under your control , letting you steal your opponents' best creatures if they ever end up in the graveyard
Their effects felt scattered, with no consistent theme to tie them together
Zurgo and Ojutai Hitting hard and allowing you to see extra cards each turn, Zurgo and Ojutai is a particularly effective dragon commander, and it shines when paired with dragons that have powerful ETB abilities, like Bogardan Hellkite