🃏 Synergies: Perkeo benefits greatly when paired with Blueprint and/or Brainstorm allowing players to generate 2-3 negative consumables every blind. Note that each trigger of the ability may select a different consumable to copy. Superposition Cartomancer Hallucination Vagabond and 8 Ball can all be used to generate Tarot Cards that you can save in your consumable slots to use with Perkeo. Sixth Sense and Séance can both be used to generate powerful spectral cards that you can save to duplicate as well. Jokers like Constellation (multiplicative mult) and Fortune Teller (additive mult) can be useful to gain much higher scores as you will likely be using lots of duplicated planet and tarot cards throughout any run with Perkeo. Campfire works extremely well with Perkeo as you can continuously sell the duplicated consumable cards to keep the multiplier on it high. Gift Card works well with Perkeo if you save your consumable cards since you can sell them at a later date for much more money than they were initially worth.

Blueprint

Brainstorm

Superposition

Cartomancer

Hallucination

Vagabond

8 Ball

Sixth Sense

Séance

Constellation

Fortune Teller

Campfire

Gift Card

🍔 Tarot cards: The Fool is extremely strong with Perkeo as it will allow you to duplicate cards you previously used from packs to put into your consumable slot. This makes it much easier to find the consumable cards youre looking for. The Hanged Man is one of the strongest interactions with Perkeo as you can use it to keep removing cards from your deck. Death can allow you to turn your entire deck into particular cards you want especially if theyre enhanced. The Empress and The Emperor can allow you to dig for more useful planet and tarot cards respectively. Judgement and The Wheel of Fortune can let you create more jokers if you need them or enhance existing jokers.

🍔 Spectral cards: Cryptid and Immolate are arguably the best cards to use with Perkeo. Immolate allows you to get an insane amount of money while thinning your deck out significantly and Cryptid being the most useful by letting you duplicate existing buffed up cards in your deck. Aura and Ectoplasm are useful to have so you can enhance your deck or enhance your jokers. Though you should only really try to use ectoplasm a few times at most since the compounding - hand size will eventually make it extremely hard to build a decent hand. Deja Vu Talisman Trance and Medium can allow you to cover your entire deck in seals if you need it. However the best strategy is to use them a few times and then just duplicate the cards you put them on. Red seals are the most useful for going into the late game especially for endless mode.

🍔 Planet cards: No particular planet cards synergize with Perkeo. If your deck focuses on a particular hand you can use Perkeo to endlessly duplicate the relevant Planet card to enhance the hand each round or to power the hand up with the Observatory voucher.

🎟️ The Observatory voucher is arguably the strongest synergy one can get with Perkeo. It makes planet cards in your consumable slot give x1.5 mult for their respective hands when that hand is played so naturally you want to build your deck to play a particular hand. The most consistent for Endless mode are likely either High Card Five of a Kind or Flush Fives though it can be built to work with any hand. If you can get just one of the planet cards that relates to the hand you want to play most it can cause some insane scaling. This is doubly true for for any effects like Blueprint or Brainstorm where having those can get 1 2 or even 3 cards from Perkeo for every shop you get.

🎟️ Tarot/Planet Merchant and Tycoon can give you better access to Planet and Tarot Cards to duplicate. The Zodiac deck works well with Perkeo as it starts with both the Tarot Merchant and Planet Merchant vouchers.

📚 Perkeo of Heidelberg (born Clemens Pankert according to other sources Giovanni Clementi; 1702–1735) was a notable jester of Elector Palatine Charles III Philip in Heidelberg. As guardian of the Great Heidelberg Tun he has since become an unofficial mascot of the city and region. His name story and image have been connected with a variety of festivals traditional songs cultural and scientific institutions hotels restaurants and private companies (in and out of the region) ever since.

📚 This joker is animated with Perkeo hovering just above the green card face.

📚 The other legendary Jokers are Canio Chicot Triboulet and Yorick.