If you can navigate the color-intensive cost, you can search for your bomb dragons like Scion of Draco and have a copy of it for much cheaper
As such it is only when you need specific things for your deck to function, either you are light on answers or are revolving around some sort of engine or synergy that you become happier paying two mana in your turn to get a card you want
And while 90s creatures generally suck they get a whole lot stronger if we dont have to pay their absurd mana costs: I went with Crater Hellion and Thunder Dragon as mini board wipes, Multani, Maro-Sorcerer and Verdant Force as beefy dorks, but my favorite is Zodiac Dragon, a Dragon that doesnt even fly but has a big body and returns itself to hand each time it dies, which means you can do stupid stuff like cheat it out with Sneak Attack for one mana, then sacrifice it to Greater Good to draw 8 cards, return it to hand and repeat as much as you want

Acid-Spewer Dragon Adult Gold Dragon Akoum Hellkite Akul the Unrepentant Alabaster Dragon Amareth, the Lustrous Ambitious Dragonborn Amethyst Dragon Ancestor Dragon Ancient Brass Dragon Ancient Bronze Dragon Ancient Copper Dragon Ancient Copper Dragon Ancient Gold Dragon Ancient Hellkite Ancient Silver Dragon Ao, the Dawn Sky Arashin Sovereign Arcades Sabboth Arcades, the Strategist Arcbound Whelp Archive Dragon Archwing Dragon Armament Dragon Artificer's Dragon Ashmouth Dragon Astral Dragon Atarka, World Render Atsushi, the Blazing Sky Avaricious Dragon Avenging Hunter Backdraft Hellkite Bahamut, Warden of Light Balefire Dragon Beledros Witherbloom Belltoll Dragon Betor, Ancestor's Voice Betor, Kin to All Bhaal's Invoker Black Dragon Bladewing the Risen Bladewing, Deathless Tyrant Blast-Furnace Hellkite Bloomvine Regent Blue Dragon Bogardan Hellkite Boltwing Marauder Bone Devourer Bone Dragon Bonehoard Dracosaur Boneyard Scourge Boulderborn Dragon Brainstealer Dragon Brimstone Dragon Broodcaller Scourge Broodmate Dragon Broodmate Tyrant Caldera Pyremaw Canopy Dragon Canopy Gargantuan Capricious Hellraiser Catacomb Dragon Cavern-Hoard Dragon Chaos Dragon Chardalyn Dragon Chiss-Goria, Forge Tyrant Chromium Chromium, the Mutable Clarion Conqueror Clockwork Dragon Cloud Dragon Colossal Grave-Reaver

Streets of New Capenna , for example, started with its default being Khans of Tarkir 's set skeleton