Battle for Everyone's Souls

As Battle for Everyone's Souls enters the battlefield, choose Life or Death.
•Life - At the beginning of your upkeep, you win
the game if you control a land of each basic land
type and a creature of each color.
•Death - At the beginning of your end step, each opponent loses the game if you control a
creature named Nyx Avatar and a creature named Erebus, God of Shadows.