Act. Stage 3
Objective - If the Harbinger of Valusia leaves play, advance.
Another Expedition - Back
The investigator nearest to the Harbinger of Valusia takes control of the set-aside Veda Whitsley.
Remove the remainder of the "g/h" act deck from the game. If another act card is in play, continue playing. Otherwise, proceed to (→R1).


Veda Whitsley
Skilled Botanist
Asset. Ally
Ally. Wayfarer.
Cost: 1.
Exhaust Veda Whitsley: Look at the top card of the exploration deck or encounter deck. If it is an enemy, you may deal 1 damage to Veda Whitsley to discard it. If it is a treachery, you may deal 1 horror to Veda Whitsley to discard it. Otherwise, return it to the top of its deck.

Scenario
Perform the setup as indicated in The Forgotten Age Campaign Guide, with the following exceptions:
- When gathering encounter sets, also gather the new encounter sets for Return to The Boundary Beyond shown here.
(Continued on reverse side.)
Return to The Boundary Beyond - Back
- Add the new Present-Day locations to the original locations from The Boundary Beyond encounter set. Remove 1 of the 2 copies of each of these locations from the game at random. Put the remaining locations into play.
- After setup, search the collection for the new Harbinger of Valusia (The Sleeper Returns) and set it aside, out of play. If the Harbinger of Valusia would enter play during this scenario, use this version instead of the original one.
- When building the exploration deck, use only the 12 single-sided Ancient locations. Do not include any of the other encounter cards listed in the original setup instructions.


Temple Ruins - Back
Location
Mexico City. Present-Day.
After you successfully investigate Temple Ruins: Explore. Draw the top card of the exploration deck. If it is a location with a matching location symbol in the upper-left corner, place it on top of this location, taking its place.


Metropolitan Cathedral - Back
Location
Mexico City. Present-Day.
Take 1 horror: Gain 2 resources.
If you have 10 or more resources: Explore. Draw the top card of the exploration deck. If it is a location with a matching location symbol in the upper-left corner, place it on top of this location, taking its place.


Chapultepec Park - Back
Location
Mexico City. Present-Day.
Forced - After you fail an test while at Chapultepec Park: Take 1 damage.
: Explore. Test (3). If you succeed, draw the top card of the exploration deck. If it is a location with a matching location symbol in the upper-left corner, place it on top of this location, taking its place.


Zócalo - Back
Location
Mexico City. Present-Day.
Discard cards with a combined total of at least 4 skill icons from your hand: Explore. Draw the top card of the exploration deck. If it is a location with a matching location symbol in the upper-left corner, place it on top of this location, taking its place.


Xochimilco - Back
Location
Mexico City. Present-Day.
After you successfully fight or evade an enemy at Xochimilco: Explore. Draw the top card of the exploration deck. If it is a location with a matching location symbol in the upper-left corner, place it on top of this location, taking its place.


Coyoacán - Back
Location
Mexico City. Present-Day.
While you are at Coyoacán, damage/horror cannot be healed from cards you control.
If you have 5 or more total damage and/or horror on your investigator: Explore. Draw the top card of the exploration deck. If it is a location with a matching location symbol in the upper-left corner, place it on top of this location, taking its place.


Scenario
Perform the setup as indicated in The Forgotten Age Campaign Guide, with the following exceptions:
- When gathering encounter sets, also gather the new encounter sets for Return to Heart of the Elders, Part 1 shown here.
- Remove Act 1a - "Search for the Pattern" from the game and replace it with the new Act 1a - "A Familiar Pattern."
(Continued on reverse side.)
Return to Heart of the Elders, Part 1 - Back
- When building the exploration deck, include only 1 of the 2 locations with each of the following connection symbols, chosen at random:
Purple Moon, Blue Triangle, Red Square, Orange Heart. Remove the other 4 Jungle locations from the game without looking at them. Do not include any of the other encounter cards listed in the original setup instructions. (There should be a total of 6 cards.)
For the duration of this scenario, the following additional rules apply:
"The 'check your supplies' ability on the Mouth of K'n-yan can be used from any location.
Forced - After a successful exploration ends: Shuffle the top card of the encounter deck into the exploration deck."
Attach this card to the scenario reference card as a reminder.


Act. Stage 1
Objective - When the investigators have collected the requisite number of clues, they must immediately spend them and advance.
The Winged Serpent
The Fury of Yig
Enemy
Monster. Serpent. Elite.
Spawn - Mouth of K'n-yan.
Hunter. Massive.
Cannot be defeated. Cannot make attacks of opportunity.
Forced - If there are 5 or more damage on this enemy, or after a pillar token is placed on the Mouth of K'n-yan: Heal all damage from this enemy and exhaust it. It does not ready during the upkeep phase this round.


Enemy
Creature. Serpent.
X is the number of pillar tokens on Mouth of K'n-yan. While X is 3 or higher, Feathered Serpent gains alert and hunter.
: Evade. Check your supplies. If you have a mysterious scepter, you automatically evade the serpent and command it to deal its damage to another enemy at its location.

Scenario
Perform the setup as indicated in The Forgotten Age Campaign Guide, with the following exceptions:
- When gathering encounter sets, also gather the new encounter sets for Return to Heart of the Elders, Part 2 shown here.
- After setup, search the collection for the new Harbinger of Valusia (The Sleeper Returns) and set it aside, out of play. If the Harbinger of Valusia would enter play during this scenario, use this version instead of the original one.
(Continued on reverse side.)
Return to Heart of the Elders, Part 2 - Back
- When building the exploration deck, include only 1 of the 2 locations with each of the following connection symbols, chosen at random:
Purple Moon, Blue Triangle, Red Square, Green Diamond.
Remove the other 4 Ancient locations from the game without looking at them. Do not include any of the other encounter cards listed in the original setup instructions. (There should be a total of 5 cards, not counting the set-aside Descent to Yoth.)
For the duration of this scenario, the following additional rules apply:
"The 'check your supplies' ability on the Mouth of K'n-yan can be used from any location, and it discards enemies as well as treacheries.
Forced - After a successful exploration ends: Shuffle the top card of the encounter deck into the exploration deck."
Attach this card to the scenario reference card as a reminder.


Location
Ancient. Cave. Ruins.
: Check your supplies. If you have a compass, discover 2 clues on Ruins of K'n-yan. (Group limit once per game.)

Location
Ancient. Cave.
If there are no clues on Subterranean Swamp: Check your supplies. If you have a canteen, place 1 doom on this location and record "sticky goop" in your supplies. (Group limit once per game.)
Forced - After you fail a skill test while investigating Subterranean Swamp: Check your supplies. If you do not have a pocketknife, lose all remaining actions and end your turn.

Location
Ancient. Cave.
Forced - After the last clue is discovered from Chthonian Depths: Check your supplies. If no investigator at this location has torches, place 1 doom on it.

Location
Ancient. Cave.
: Check your supplies. If you have a pickaxe, reduce the shroud value of Treacherous Descent by 2 for the remainder of the scenario. (Group limit 3 times per game.)

Scenario
Perform the setup as indicated in The Forgotten Age Campaign Guide, with the following exceptions:
- When gathering encounter sets, also gather the new encounter sets for Return to The City of Archives shown here.
- Put Halls of Pnakotus (Southern Corridors) into play.
(Continued on reverse side.)
Return to The City of Archives - Back
- Set Cyclopean Vaults and Alien Conservatory aside, out of play. (These locations should be put into play during act 1b when the remainder of the set-aside locations are put into play.)
- Remove Act 2a - "Restricted Access" from the game and replace it with the new Act 2a - "Unrestricted Access."


Act. Stage 2
Objective - If three of the following are true, you must advance:
- An investigator "found the process."
- An investigator "dissected an organ."
- An investigator "interviewed a subject."
- An investigator "realized what year it is."
- An investigator "activated the device."
- An investigator controls The Custodian.
- An investigator "read about Earth."
- An investigator "saw a familiar specimen."
The Process - Back
You no longer have to perform any of the following tasks. However, the more you have performed by the time the scenario ends, the easier the transition to your human body will be, and the less likely the process is to fail or backfire. Be careful...
Put this act into play with this side faceup as a reminder.
- An investigator "found the process."
- An investigator "dissected an organ."
- An investigator "interviewed a subject."
- An investigator "realized what year it is."
- An investigator "activated the device."
- An investigator controls The Custodian.
- An investigator "read about Earth."
- An investigator "saw a familiar specimen."


Halls of Pnakotus - Back
This location is connected to Halls of Pnakotus (Eastern Corridors) and Halls of Pnakotus (Western Corridors), and vice versa.
Halls of Pnakotus
Southern Corridors
Location
Ancient. Pnakotus.
This location is connected to Halls of Pnakotus (Eastern Corridors) and Halls of Pnakotus (Western Corridors), and vice versa.
During your turn, choose and discard a card from your hand: Move to another copy of Halls of Pnakotus. (Limit once per turn.)

