Rayami, First of the Fallen Rayami, First of the Fallen, like Indominus Rex, Alpha, benefits from creatures with many keywords on them, except that in Rayamis case, the creatures with keywords dont need to be yours
Still, the Dash ability of Ragavan, Nimble Pilferer means that it is a constant threat that your opponent needs to be aware of, and that in it of itself is powerful as it will force your opponent to sequence in such a way to respect the potential Dash attack
Some tribes like Kraken/Leviathan/Octopus/Serpent (KLOS) have their own subset of thematic cards like Quest for Ula's Temple or Spawning Kraken, whereas a tribe like dragons has incredible payoffs like Dragon Tempest, Scourge of Valkas, Utvara Hellkite, or Wrathful Red Dragon
This is a core tension underlying this entire array of cards and theres no clear answer
If all the most popular decks in the meta are controlling decks without many creatures, you probably won't need as many cards like Path of Peril, Wrath of God, or Supreme Verdict
Primal Command Primal Command was a bigger deal when it was released than it is now