With a new set based on the hybrid-heavy plane of Lorwyn on the horizon, this change feels less like a matter of if and more a matter of when
Number 263 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Pioneer, Timeless Restricted Formats Vintage Not Legal Formats Alchemy, Pauper, Standard Banned Formats Legacy, Modern Rulings (3/19/2021) Delve doesn't change a spell's mana cost or mana value
These cards are identical to the normal cards in name, text, etc
Karakas First Printed: 1994-JUN Banned: 2008-SEP Commander is a format that focuses on legendary creatures that tie together decks thematically, and Karakas is a land that can both prevent a player from having consistent access to their commander AND allow its controller to consistently save their commander from removal
Sylvia/Khorvath: Combat-oriented generals, one of whom is pretty expensive
Coram gets larger as bigger creatures wind up in everyone's graveyards, he mills decks for more recursion targets, and he provides access to a milled spell or land every turn--all things that synergize well with Graveyard Overdrive's plans