Shards of Alara design was anything but typical
Before the release of Lorwyn in 2007, class creature types were far from common
If Molten Man leaves the battlefield before his enters triggered ability resolves, the leaves-the-battlefield triggered ability will resolve first, and you will sacrifice a land before searching your library for a Mountain
the difference this time is you target the Codex Shredder with the copied ability instead, untapping it
Whether you're playing it in Control, Bant Field of the Dead, Esper Planeswalkers, or whatever other deck you're running, or your building your deck against it, be ready for Supreme Verdict with other countermeasures like Selfless Spirit or be ready to build a threat base that mixes in other threats like planeswalkers or vehicles to help insulate yourself
Think about it that way: You pay 1 mana more than with Feed the Swarm, but you can directly hit two creatures AND you only pay 5 life , whereas you easily pay 4+ life with Feed the Swarm