[RPG] What are the specifics of the Summoner’s eidolon summoning ritual

magicpathfinder-1esummoner

The summoner class casts a one minute ritual to call forth their Eidolon. From the PFSRD:

A summoner can summon his eidolon in a ritual that takes 1 minute to perform.

Have Paizo ever stated anything official about what the ritual entails, or what the summoner can or can't do during that ritual?

Does it take full concentration? Can the summoner take 5 foot steps, move actions, anything? Concentration checks needed?

Most of the discussion forums I've read just say "GM fiat," which is fine, but I'd love to know if there was anything official.

Best Answer

While there's nothing that specifically calls out the Summoner's Eidolon ritual, I'm going to use the rules for casting time:

A spell that takes 1 minute to cast comes into effect just before your turn 1 minute later (and for each of those 10 rounds, you are casting a spell as a full-round action, just as noted above for 1-round casting times). These actions must be consecutive and uninterrupted, or the spell automatically fails. Emphasis mine

The rules for a full-round action state:

A full-round action requires an entire round to complete. Thus, it can't be coupled with a standard or a move action, though if it does not involve moving any distance, you can take a 5-foot step.

You must also maintain concentration for the entire duration (10 rounds for a 1 minute spell) of the casting:

When you begin a spell that takes 1 round or longer to cast, you must continue the invocations, gestures, and concentration from 1 round to just before your turn in the next round (at least). If you lose concentration after starting the spell and before it is complete, you lose the spell.

So you may make a 5-foot step every round, but injury, violent motion and other dangers force concentration checks and, if you miss your roll, you must restart the ritual.