Elder Godbind

Caster summons any entity/deity classified as a "Great Old One"(See page 109 of players handbook for examples), or portions of the entity based on the size of the summoning circle. DM can request a saving throw for a degree of control over the summoned entities actions/attacks, with a fail resulting in a wild outburst and general sentience of the entity while it is summoned. A successful throw results in partial to full command of the entity per the DM's judging of the throw's value.(I.e. certain rolls result in more or less control over the summon)(Also note that a success on the saving throw will always result in the entity being non-hostile to its Summoner). Depending on the amount of space available or used by the summoning, the amount of the entity summoned will take full advantage of however much space there is. For example if only a few feet is available only a small portion of appendage or limb may be summoned. Conversely if enough space is allotted by the caster's sigil/summoning circle, the entire entity may be summoned. This, while difficult due to the usually massive proportions of the entities, can be achieved under certain circumstances or preparations. (I.e. a pocket dimension or extended period of preparation time to use a normal space)