Eruption of Death Mountain

Each player can pay part of this spells mana cost
Rochambeau (Each player exiles all instant and
sorcery card in their graveyard with doom counters
on them. Each player then simultaneously casts each
instant and sorcery card they own from exile with
doom counters on them. Spells with an {x} value in
their casting cost are cast as if {x} was equal to 5.
Spells cast from exile cant be countered this turn,
Players have to randomly choose the targets of each
spell they cast form exile th