Nicias, Knight of Olicharchs

When Nicias, Knight of Olicharchs enters the battlefield give each opponent 4 treasure tokens.
At the beginning of each opponent's upkeep
that player sacrifices an artifact or loses 4 life
and you gain 4 life.
At the beginning of your end step each
opponent sacrifices an artifact, for each player
that can't they lose 2 life and you gain 2 life.