Ullr, Bloodborn Usurper

You may cast Ullr, Secret Usurper only if you
own a card named Ullr, AllFathers General in
your graveyard.
When Ullr, Bloodborn Usurper enters the battlefield each opponent sacrifices all God's they control, then those players discard a card and
lose 2 life for each God sacrificed this way.
"Face me Odin! Or bear witness your beloved family's
death" - Ullr, Bloodborn Usurper