Theres the obvious benefit that youre getting some free creatures to swing with for one turn, but Mirror March lets you cash in on multiple effects that trigger when that creature enters the battlefield
This land will shine in decks that need the commander to stick around for things like combat damage, but it also feels like a solid inclusion in decks based around legendary creatures
General Marhault Elsdragon does one thing and one thing only, but it does it in the most amusing way possible
Adventure Lands Final Fantasy includes a cycle of rare adventure lands (one for each color)
Instead of sending cards to different stores, you ship everything to them once, and their team handles grading, pricing, and finding the best offers across multiple vendors
Sacrifice and Culling the Weak Sacrifice reminds me a lot of Energy Tap in blue, except you have to give up the creature youre using for mana acceleration