Monster Channeler (Apath)

Unofficial rules compendium

The medium is an archetype of the summoner. Instead of summoning creatures into his presence, the medium summons creatures to possess his own body.

Possession

Whenever you summon or call a creature, that creature manifests inside your 's body. When this happens, your body is displaced into an extra-dimensional space, and replaced with the summoned or called creature. While in this extra-dimensional space, you are impervious to all effects. You can perceive what the possessing creature perceives and can communicate telepathically with it. This telepathy transcends language barriers. You have the normal degree of control over the creature, depending on how it was controlled or called. In effect, you now plays the creature instead of your normal character.

When the effect ends or the creature is defeated, the creature disappears and you return to the world in the same space the creature occupied. If you cannot stand in this spot (for example if it is occupied or filled with rubble) you appear in the nearest unoccupied space able to hold you.

When you and a creature change places

At 16th level, as a full-round action, a summoner can touch his eidolon and the two can merge forms. This transformation includes all of the summoner’s gear. While merged in this way, the summoner is protected from harm and cannot be the target of spells or effects. All effects and spells currently targeting the summoner are suspended until the summoner emerges from the eidolon (although durations continue to expire).

The summoner can cast spells while inside the eidolon by taking control of the eidolon for the duration of the casting. Any material components used for these spells are taken from the summoner’s gear, even though they are otherwise inaccessible. The summoner can direct all of the eidolon’s actions while merged, can perceive through its senses, and can speak through its voice.

The summoner can use this ability for a number of rounds per day equal to his summoner level. He can end this effect at any time as a swift action. The summoner emerges in a square adjacent to the eidolon if able. If the eidolon is returned to its home plane while the summoner is merged with it, the summoner is immediately ejected, taking 4d6 points of damage, and is stunned for 1 round.