Serpent's Skull in Eberron
Zenj Spirit Totem Tattoo
3/week a PC can call on their Spirit Totem Animal to give them a +5 sacred bonus on one skill check (depending on the animal) or they can use Wild Empathy (as the druid ability) to talk with a wild animal.
Hoofed Animals (antelope)
Equine Animals (horse)
In return for freeing the village’s spirit dancers from the influence of the succubus Zakayya, each PC received a tattoo of their spirit animal on the back of their neck. The PC can call on their spirit animal 3/week for a bonus.