Siberys Dragonmark (Death)

You possess a Siberys Dragonmark, the largest and most powerful expression of a dragonmark. This may have evolved from an existing Greater Dragonmark, or you may have manifested it spontaneously. The Siberys Dragonmark of Death provides the following benefits:

• Your charisma score increases by 1, to a maximum of 20.
• When you make a Charisma ability check to interact with a dragon or another dragonmarked creature, you roll one intuition die and add the number related to the ability check. With these interactions, the minimum intuition die you can roll is a d6, for example, if you already have a Greater Dragonmark of Death, the intuition die becomes a d8.
• You can cast the revivify, raise dead, and spirit guardians spells once without expending a spell slot. You regain the ability to cast these spells when you finish a long rest. If you already have a Greater Dragonmark of Death, you can cast spirit guardians twice before you finish a long rest. Your spellcasting ability for these spells is Charisma.