Syr Noinne, the Solemn

When Syr Noinne, the Solemn enters the battlefield or dies, each opponent loses 3 life
unless they sacrifice a permanent or discard a
card.
Whenever an opponent loses life, you gain that
much life.
Retort- Whenever Syr Noinne is dealt nonleathal damage, each opponent discards a card and loses
3 life.