Id recommend avoiding the each opponent mode unless itll win the game but across three choices with the other two modes, its not unrealistic to remove three or four permanents with this one card
Whether or not the combo potential locked inside this card will be useable, however, remains to be seen
Hes one of the best mythic rare MTG cards for artifact strategies, and one creature doing all of that at four mana is why he dominates Commander
Given that red decks are popular and favored against Rally, I would opt to play none at all
Activating Lethal Vapors' activated ability is an "action", so the players are not required to take it in order to break the loop
The top card of my library is a creature card, and something puts the top card of my library into my graveyard