mtg card leaks Secrets of Strixhaven Spoilers: All Cards Revealed! Mutable Explorer from Lorwyn Eclipsed

It adds a ton of consistency to lands decks in Brawl and helps maximize cards like Icetill Explorer in Timeless that let you resurrect lands on command

It doesn't copy whether the creature is tapped or untapped, whether it has any counters on it or Auras and/or Equipment attached to it, or any non-copy effects that changed its power, toughness, types, color, and so on

Cards like Archon of Emeria that limit the number of spells you can play in a turn can be devastating

I think it'll be a fun commander to build, but I wish there were more wraiths

However, we can see from the use of two set icons that there are likely still Commander-focused cards coming, despite the lack of a precon, and this could be one of them.

All language printings are documented in this chart