Resurrection

The resurrection rules used by Critical Role, as described in the D&D 5e official Critical Role: Tal'Dorei Campaign Setting book, page 118 - 119.

Death DC

When a creature is resurrected, a roll is made against a DC, which begins at 10. For each time the creature dies, their death DC is increased by 1.

Rapid Resurrection

If a character is dead, and a resurrection is attempted by a spell or spell effect with a casting time longer than 1 action, the caster makes a spellcasting ability check against the target's death DC. On a success, the spell takes hold and the creature is resurrected. On a failure, the creature's death DC is increased by 1, and they can't be resurrected until they are resurrected by a spell with a casting time longer than one action.

Resurrection Ritual

When a creature is targeted by a resurrection spell with a casting time longer than one action, such as Raise Dead or Resurrection, a ritual is initiated in which up to three creatures can contribute in order to call the creature's soul back to their body. The creature makes an ability check with a skill the DM deems appropriate for the action, against a DC that the DM also determines.

For each successful check, the creature's death DC is lowered by 3 for this ritual. For each failure, it increases by 1 for this ritual. The DM makes the final roll against this DC. On a success, the creature is returned to life if its soul is willing. On a failure, the creature's soul is lost, and further resurrection rituals fail automatically.

Only the strongest of magic can bypass this ritual, in the form the True Resurrection or Wish spells. These spells can also return to life a creature whose soul was lost from a failed ritual.