Summoning Stones - Keeping Your Allies Close

From publisher blurb: Welcome to issue #132 of the Player Paraphernalia series. This issue introduces gairm stones, géilleadh stones, and standing stones. These magic items may appear crude, but they offer a quick means to call forth allies in time of need. Focusing on conjuration magic, gairm stones are triggered items with a limited number of charges. Géilleadh stones are single use items that erupt in one or more summoned creatures when thrown. Standing stones are large monoliths or free standing structures that are actually powerful artifacts that require complex and ancient rituals to unlock their power.