The prediction window was 1 hour + 30 minutes bonus from Perpetua's Departure.

The portal image confirms the clues we got.

The passcode to get this Tessera was drjohnsnowrscplaque

The prediction window was 1 hour + 30 minutes bonus from Tecthulhu.

'Fighting for life' is a book by Sara Josephine Baker, in the background we see a book Dr. Jo, about Sara Josephine Baker. The text in the middle is about the Bureau of Child Hygiene of the Health Department of New York, established by Sara Josephine Baker. In the top we see 'last name' pointing to ggdaa fgggf afgax agg. Decode with ADFGX and regular alphabet-J, using Baker as keyword, the solution is doctorate. Sara Baker became the first woman to receive a doctorate in public health, at the New York University School of Medicine. At that location are several portals, of which one is Spot, a Dalmatian balancing a taxi on his nose. This matches the Dalmatian in the clue.

The passcode to get this Tessera was balancingact

The prediction window was 30 minutes with a bonus of 60 minutes.

Five of the squares in the image have the text agku cdnvz mpsw fijotxy behlqr

Replacing the letter with the numbers 1 to 5, corresponding to which square the letter belongs to, we get: 15225415441532435534123442

Using a Polybius cipher, this gives egyetemszobor, which translated from Hungarian to English gives us "university statue" which is a hint to what the portal is.

The image refers to the safe practice of hand washing, which was first pioneered in the 19th century by Ignaz Semmelweis, a Hungarian physician and scientist. Semmelweis's work on hand hygiene was the cornerstone of infection prevention.

As part of Semmelweis's legacy, in 1969 during the bicentennial of the founding of the Medical Faculty at the University of Nagyszombat, the University decided to mark the occasion by taking the name of its most famous professor, Ignác Semmelweis. The Budapest University of Medicine thus became Semmelweis University of Medicine.

On the grounds of the university is a statue, honouring Ignaz Semmelweis. Inputting the name of the portal for this statue provided the Alchemist Archetype media.

The passcode to get this Tessera was SemmelweisIgnacSzobra

The prediction window was 1 hour + 2.5 hours

Evenly spaced out across the ASCII art are the shapes of crosses (not highlighted).

One of the first results for ARC is the American Red Cross, which was established in Washington, D.C., on May 21, 1881, by Clarissa Harlowe Barton (CHB).

In 1975, the Clara Barton National Historic Site, located at 5801 Oxford Road, Glen Echo, Maryland, was established as a unit of the National Park Service at Barton's home, where she spent the last 15 years of her life.

There is a portal at the home site that is dedicated to Clara's life of service. Entering this portal's name yielded the media.

In summary, the clues found meant:

• ARC = American Red Cross

• 5801 = Address of the Clara Barton National Historic Site

• CHB = Clara Harlowe Barton

• LIFE = The Historic Site is dedicated to interpreting Clara's life and is part of the name of the portal on the site

• 1975 = The year the Historic Site was established.

Additionally the cross symbol makes up the logo for the Red Cross and the purple stained background is representative of red blood staining purple.

The passcode to get this Tessera was ALifeofService

The prediction window was 60 minutes with a bonus of 60 minutes.

The picture depicts a scene of an underwater shipwreck with two Victoria Crosses floating in the water. Surrounding the picture is a gilded frame featuring leafs and the word "Remember" adorned along the top, suggesting that the target portal may be a memorial of some kind. In the bottom left corner of the frame are the roman numerals MMVII (2007).

From the Devra Bogdanovich is Recruited video which was released as part of the Tessera directly preceding this one, ADA responses to Wendy's question asking what the name "Dunraven" means with ADA stating "The HMS Dunraven was a Q-ship that sank during the first World War."

The HMS Dunraven was disguised as a merchant ship and was intercepted by a German submarine (UC-71) on 8 August 1917 in the Bay of Biscay, which subsequently attacked the ship revealing its true identity. The Dunraven was sunk two days later as it was being towed towards Plymouth.

In recognition of valor "in the presence of the enemy", two Victoria Crosses were awarded, one to the ship's First Lieutenant, Lt. Charles George Bonner RNR, and the other, by ballot, to a gunlayer, Petty Officer Ernest Herbert Pitcher.

Bonner was born and had his ashes buried at St Mary's Church in Aldridge, England. Subsequently, in 2007 a commemorative plaque was unveiled at the Aldridge Victoria Cross War Memorial, dedicating Bonner's life, bravery and achievements which are also specifically celebrated in the annual Remembrance Day parade.

The Aldridge Victoria Cross War Memorial is located outside St Mary's Church and is also depicted in the background of the image, behind the stingray. Its portal name was identified as the solution to the puzzle.

Additionally, the stingray may represent the Dunraven sinking whilst it was being towed (represented by the line attached to the stingray), as the stingray itself is motioning towards the bottom of the ocean. Stingrays are also said to be seen at the physical wreck of the HMS Dunraven.

The gilded frame and motif of the image may be representative of the painting of "HMS Dunraven" by Charles Pears (featured on the Wikipedia page).

The gilded leaves along the frame are from Alder trees. The earliest recorded name of the town of Aldridge is "Alrewic", which may have originated from an abundance of Alder trees in the area. Another suggestion is that the name "Aldbridge" means "outlying farm among alder-trees", from the Old English alor and wīc.

Furthermore, the Alder tree is often associated with courage, which may suggest a connection to the Victoria Cross.

The passcode to get this Tessera was LestWeForget

The prediction window was 30 minutes with a bonus of 30 minutes.

The image metadata gives us the clue "What did you keep?" Which from the video and hints that were released directly before this puzzle (Optima Ultimatum) was suggested as being a motto, more specifically, the motto of Nemesis: Join Our Ranks.

The painting is a modified version of "Fields of Tulip With The Rijnsburg Windmill" (1886) by Claude Monet, whom was captivated by the Dutch landscape, with its windmills and bulb-fields, and produced five paintings of them.

The tree in the centre of the painting is from a different painting or image, however it does feature the silhouette of a treehouse with letters inscribed in its white space.

The letters in the tree are:

rxhrfyezj

mojnbqwny

ivnvtrnfm

awdgvrrxa

snmeshzaz

rbwwwrmsl

veiwjwasv

Which can be decoded using a Vigenère cipher with the key being the motto: joinourranks. This provides the result:

ijzerenij

zerenijze

renijzere

nijpereni

jzerenijz

erenijzer

enijzeren

Which is the Dutch word "ijzeren" repeated nine times. This word in English is "iron".

The postbox has the words "brievenbus", which is Dutch for postbox and also features a hexagonal shaped white-space with letters.

rbydp

mvxw

-jpla

-d

Using a Vigenère cipher, combining the text from (1) and (2) together with the key "joinourranks" gives "enemymine-abdn-p"

The hexagonal shape of the white-space may represent the EnemyMine media that was previously used by Optima/Devra to send messages in the past.

The hexagonal white-space has also replaced the Coat of arms of the Netherlands, which would usually be placed in its position. The motto of the Coat of Arms is called the "Je Maintiendrai", which translates to "I shall maintain."

The bottom-left corner of the painting has a signature of a "J. Cremer", a common surname in the Netherlands. De Nederlandsche Scheepsbouw Maatschappij (NDSM) was founded on 25 August 1894 by wealthy Member of Parliament Jacob Theodoor Cremer , former director of the Deli Maatschappij. Today, NDSM is a cultural hub, filled with art and sculptures. In this location is a portal called "Iron Treehouse", which yielded the media.

An additional clue was given as a message from the Tethered Hand, "What did you keep, what is it, & where was it found?"

Keep? Motto.
What is it? Treehouse
Where was it found? NDSM Werf, Netherlands

The passcode to get this Tessera was IronTreehouse