As for the Wastes, this is notable as one of the few non-Eldrazi flavored versions of the card, outside of some Secret Lair products
Flavor Text He finally understood that phyresis was not an ending, but a new, perfect beginning
The idea here is these three Creatures are each capable of tapping for more than one mana, so we make more than one and use the we make to untap the Creature
But it also generates a Lander token every time it taps (you pay two mana to sacrifice a Lander to then put a land card from your deck on the battlefield)
Similarly, Arcades draws you a card whenever a defender creatures enters the battlefield under your control
Additionally, if you can get a lot of characters out fast, and a lot more once Be Prepared is played, you could very likely beat Ruby/Amethyst to the punch