The Stars Gaze Upon Us

In order to cast this spell, there are needed at least 3 warlocks who share the spell levels needed to cast this spell, there can be more than 3 warlocks casting the spell, the minimum spell level slot needed to participate is a level 1. The sacrifice needs to be a humanoid of 13 INT at the very least, a monster humanoid can work but it needs to be of good alignment on top of the INT needed.

Once the participants start the ritual no other warlock can be added, the ritual requires 8 hours of chanting inside a magic circle it must be cast in a place with a clear sight of the sky  the victim must not exit the circle of the ritual otherwise it will fail, at the 8-hour mark the victim must be sacrificed by the warlock who used the highest spell slot to cast the spell. Once the spell is completed it lasts for a week and can be extended at the end of the week by repeating the ritual, a sacrifice is not needed to extend the spell but doing so increases the spell slots needed in 2.

While the spell is in effect the moon will shine in a dark green light and will be considered to be full moon for the duration(for lycanthropes or creatures alike). Those who can see magic, use detect magic or make a WIS (Perception) of 19 or up can see the real effect the spell had on the moon twisting its look in the form of a terrifying eyeball with dark tendrils around it, during the day the visual effects of the spell cannot be detected. The spell has a global area but it only affects the warlocks who cast it and the ones around the area of the ritual.

Those affected by the spell see their magic powers increases, all damaging spells increase their damage by 1 dice. All illusions, control, utility or spells that don't deal direct damage see their duration doubled. All communication, creation, detection, healing, and scrying have their range doubled. A spell can only benefit for one of this buffs at a time the caster can choose which one to use in the case that they overlap.

Additionally, all the members who cast the spell find their skin translucid and in a grim tone of green that can only be seen by the same methods needed to see the moon true aspect, this skin gives them resistance to all weapon damage that are not magical , on top of that if a limb were to be cut or heavily damaged it gets replaced by tentacles with green translucid skin, the warlock gets proficiency with unarmed strikes with the tentacle it deals 1d6 psychic damage, has reach and heals the warlock by 3d8 when the tentacles grow  from the amputated limb. If the limb was the head a new one grows in 1d4 rounds giving him the look of an abomination of flesh with big black eyes, healing him by 4d8 and granting him true vision and light sensitivity. When the spell ends the limbs remain but they lose their powers until the ritual is cast again, the tentacle limb becomes a 1s4 bludgeoning damage and the head loses the true sight.