"We're aware of some concern about combos in Modern based around War of the Spark cards, such as Neoform plus Allosaurus Rider; Ugin's Conjurant plus Celestial Kirin; and Karn, the Great Creator plus Mycosynth Lattice. We've been monitoring the play rates and win rates of these decks and, so far, don't see cause for alarm. With the release of Modern Horizons and Mythic Championship IV right around the corner, we'll continue to observe the evolution of the Modern metagame."