Skulls modify the difficulty of a Story Mission or Strike.
| Skull Modifier | Effect |
|---|---|
| Anger Issues | Minions of the Darkness display heightened aggression. |
| Angry | Minions of the Darkness won’t flinch, even after massive damage. |
| Arc Burn | Arc damage from any source is greatly increased. |
| Heroic | Enemies appear in greater numbers and are more aggressive. |
| Juggler | No ammo drops for your equipped weapon. |
| Lightswitch | Minions of the Darkness deal much more melee damage. |
| Mythic | Heavily shielded and highly aggressive enemies appear in great numbers. |
| Nightfall | You will face a relentless army that has never known defeat. If all players die, you will be returned to orbit. |
| Solar Burn | Solar damage from any source is greatly increased. |
| Void Burn | Void damage from any source is greatly increased. |
