Karlach, Fury of Avernus is one of the commanders available in Magic: The Gathering
Whether this was the right decision or not is honestly a gigantic question mark, as the format just seemed to get worse after this decision was made
Literally just search for cards with cascade and put them in the deck, its no more complicated than that
Base copies are just $0.55, which is wild for a card so mechanically similar to Birthing Pod
I'll use Muldrotha, the Gravetide as a deckbuilding example on figuring out the ratio of lands and ramp: Lands For figuring our lands, the two questions you need to ask yourself is: What's the average cmc of my spells
While it does come with the drawback of having to discard a land, it nets you one mana of any color, making it arguably better than the original Moxen from the Power Nine