Call of the Death-Dweller reads "return up to two target creature cards with total converted mana cost three or less", but the official Oracle text says "total mana value three or less" instead
That third dimension is tricky, requiring understanding of many other cards and how the community perceives them Typically, we start with the first two dimensions, and as we build our understanding of the format, we continue to update our perspective on how the cards line up against the format
Its always beneficial to have choices, and Deeproot Elite gives you much more control than Metallic Mimic does
The Cosmos holo pattern from this era is famous for boasting two beautiful markings on the holo patterns: blotches (circles or glimmering stars) and swirls (whirlpool patterns)
That implementation failed because attaching to any legendary creature made it too easy to put all your Equipment on one creature and led to games that were overly aggressive
However, while Emry returns artifacts by tapping, Glissa does so each time a creature controlled by an opponent dies