| Hondo |
The rules state:
A summoner can summon his eidolon in a ritual that takes 1 minute to perform. When summoned in this way, the eidolon hit points are unchanged from the last time it was summoned. The only exception to this is if the eidolon was slain, in which case it returns with half its normal hit points. The eidolon does not heal naturally. The eidolon remains until dismissed by the summoner (a standard action). If the eidolon is sent back to its home plane due to death, it cannot be summoned again until the following day. The eidolon cannot be sent back to its home plane by means of dispel magic, but spells such as dismissal and banishment work normally. If the summoner is unconscious, asleep, or killed, his eidolon is immediately banished.
This seems vague about whether the loss is permanent or not. Does it come back at half hit points and then can be healed? Is it a permanent loss? If so, why the comment on natural healing?
Later under Life Link and how far away you can get from the eidolon it is a lot more specific.
In addition, the eidolon and the summoner must remain within 100 feet of one another for the eidolon to remain at full strength. If the eidolon is beyond 100 feet but closer than 1,000 feet, its current and maximum hit point totals are reduced by 50%. If the eidolon is more than 1,000 feet away but closer than 10,000 feet, its current and maximum hit point totals are reduced by 75%. If the eidolon is more than 10,000 feet away, it is immediately returned to its home plane. Current hit points lost in this way are not restored when the eidolon gets closer to its summoner, but its maximum hit point total does return to normal.
| Tharg The Pirate King |
No it is not permanent and can be healed back up to the total amount that it should have. The reason to have them show up with half hit points if killed is to stop people from letting it die and bringing it back full hit points next day to not waste spells healing it.
Look at the wording, it says it comes back had 1/2 its normal hitpoints. Now 1/2 its max hit point total. this should be your indicator, that is why under life link it explains that hit points lost due to being too far away do not return but the Max hit point total is restored (you just have to heal it).