When The Earth King enters, create a 4/4 green Bear creature token.
Whenever one or more creatures you control with power 4 or greater attack, search your library for up to that many basic land cards, put them onto the battlefield tapped, then shuffle.
The Earth King has 3 listed printings; the most valuable is the Prerelease printing from PTLA at US$7.40 on TCGplayer's market price. Prices below are the cheapest in-stock listing in the United States.
Affiliate links: as an eBay Partner Network affiliate and a TCGplayer affiliate, MTG Compare earns from qualifying purchases — at no extra cost to you.