Mark of Darkness

Mark of Darkness is a spell within the Arceuus spellbook that requires level 59 Magic and the completion of A Kingdom Divided to be cast.

When under the effects of the spell, the caster will gain various buffs for a certain amount of time ((Y*3)*0.6 seconds), where Y is the player's base Magic level. If cast with a purging staff equipped, the duration is multiplied by five. With level 99 Magic the spell will last 3 minutes 58 seconds, with a purging staff equipped, the duration is increased to 14 minutes and 51 seconds.

Casting the spell results in the message You have placed a Mark of Darkness upon yourself. The player will receive the following message 10 ticks (6s) before the spell expires: Your Mark of Darkness is about to run out.. An animation will play when the caster is no longer under the effects of the spell and the player will receive the message Your Mark of Darkness has faded away..

Players under the effects of the Mark of Darkness will temporarily gain the following buffs:

• The bind chance of grasp spells is doubled, though the bind duration remains the same.
• Corruption spells will always inflict corruption on the player's next successful hit, up from a 50% chance.
• Demonbane spells will have their accuracy bonus doubled (+40%) and an additional 25% damage bonus against demons. This is calculated after the player's own magic damage bonuses from their equipment.
  • If attacking with a purging staff, this is further doubled to an 80% accuracy and 50% damage bonus when under the effects of the Mark of Darkness.