These can each exist on the battlefield without the legend rule kicking in
It's not about going for the ridiculously priced Pokmon TCG products, it's about snapping up what people aren't focused on
Mana Geyser, Treasure makers, and so on can power out monstrous dragons, Eldrazi, an Ugin or two one of the best ways to use excessive ramp is to draw a ton of cards, either to convert that ramp into card advantage, or to ensure you have a bunch of ways to use your temporary mana
Theres enough black wincons in a deck thats killing creatures to make this almost not janky, but then, in closing, you can ponder how you can kill things with your lands , like Oasis, Tower of the Magistrate, and Shizo, Death's Storehouse
Odd-Eyes Bright Hope Dragon - Dragon/Pendulum/Effect, LIGHT, 7*, ATK 2000, DEF 500