Pact boon

Pact of the Skull (CoC)
Your patron gives you a magical pact skull, generally a
humanoid or ghoul skull collected from a graveyard with
at least one hundred bodies. Using this skull, you can cast
spells you know with the ritual tag as rituals.
Additionally, the skull whispers magical secrets that
only you can hear. When you choose this feature, choose
two 1st-level spells with the ritual tag from any class (not
necessarily the same class), including this one. The chosen
spells are warlock spells for you. While the skull is within
5 feet of you, you know those spells and they do not count
against your number of warlock spells known, but you can’t
cast them using spell slots as normal. You can cast them as
rituals or as formulas (if they have the formula tag).
You can also use this class feature to cast one of the chosen
spells as an action without expending a spell slot while
your pact skull is within 5 feet of you. Once you do so, you
can’t do so again until you finish a short or long rest.
Each time you gain a warlock level, you can replace one
of the chosen spells with another ritual spell that is of a
spell level lower than half your warlock level (rounded up,
minimum 1). On your adventures, you can also add other
ritual spells to your pact skull. When you find such a spell,
you can add it to the skull if the spell’s level is equal to or
less than half your warlock level (rounded up) and if you
take the time to teach the spell to your skull. For each level
of the spell, the teaching process takes 2 hours and costs
50 gp for the rare incense that you must burn in your pact
skull while reading the spell aloud to it.
If you lose your pact skull, you can perform a 1-hour
ceremony to receive a replacement from your patron. This
ceremony can be performed during a short or long rest,
and it destroys the previous skull. Your pact skull crumbles
to sand when you die.