One general ratio to consider is that you need about 2-3 ramp sources per 1 land you remove from the deck
Zombies put free sacrifice outlets to great use, and Carrion Feeder is all the more desirable because it shares the relevant creature type
That's not a very big hill to climb to get prizes
Multiple instances of cascade each trigger separately.) P/T Number 674 Language English Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (11/10/2020) Each instance of cascade triggers and resolves separately
White, that you invest in some counter magic
Revolutionizing lands decks across all formats, Spelunking now makes common appearances in Amulet Titan and Pioneer Scapeshift Combo