If you have ever browsed a pokemon mega evolution card list and noticed how many entries belong to Mewtwo, that catalog speaks directly to how central Mewtwo is to the Mega Evolution concept
That being said, it can really push our mana mid game to get us either that big drop or those extra revive cycles to close a win
Some characters will have their own effects that only trigger when those characters are at locations, like Peter Pan, Lost Boy Leader, who will have you gain lore equal to a location's lore value the first time he moves to one each turn
In his spare time, Rollin likes to import Valkyria Chronicles merch and watch anime.
A google search I did for "mtg wiki Elminster" revealed that Elminster is also known as the "Sage of Shadowdale" and the "Old Mage"
Honorable Mention: Ashes to Ashes and Oubliette Two pretty unusual removals for Black are Ashes to Ashes and Oubliette