That's incredible value that can be enabled through something as simple as a Rampant Growth
you can banish this card from your graveyard and remove 4 ash counters from anywhere on the field to special summon up to 2 banished baby phoenix monsters, but their effects are negated until your next standby phase
Black Lotus (Beta) Peak price: $81,000 You may be surprised to see Black Lotus at number five but, spoiler alert, its not the only time the mana-producing artifact makes the list
The only eye-watering issue is Roaring Moon, a card so dominant in the meta that even its most basic incarnation, the standard ex double rare version, is fetching $13
More than that, Primite is actually competitive, whether paired with actual Normal Monster archetypes in Primite Blue-Eyes, or alongside Effect Monsters like in Primite Ryzeal
Pick whatever approach seems best in your mind