Lastly, we'd like to take this opportunity to address another problematic interaction between
Karn, the Great Creator and
Mycosynth Lattice. This combination, popular in Eldrazi and other Tron decks, can completely lock the opponent out from casting further spells. While decks featuring this combination often win in other ways, the deckbuilding cost to include this interaction is low, causing it to show up more often than is fun in competitive play. As a result, we are banning Mycosynth Lattice in Modern.