- 4-Koi (2 each in Red, Yellow, Blue or White): These cards count as four koi in their color.
- 5-Koi (2 each in Red, Yellow, Blue or White): This cards count as five koi in their color.
- Rainbow Koi (4): These koi count as one of any color.
- Apprentice (4): Play into your pond, score 1 pt for each 1-koi your opponent has in their pond.
- Monk (4): Play into your pond, score 1 pt for each 2-koi your opponent has in their pond.
- Abbot (4): Play into your pond, score 1 pt for each 1-koi your opponent has in their pond.
- Shrine (1 each in Red, Yellow, Blue or White): Place in House, River or Pond to double the number of koi of that color in that space.
Given the spiritual nature of these characters, I might need to call this expansion Moon Temple. We'll see. I feel weird having two "temple" games in my catalog.
You might recall I once tinkered with adding a fifth suit to the game, but I found it too cumbersome to make backwards-compatible with the rest of the game. Instead, I'll list that as a separate product, which is as yet unnamed. These may include:
- All colors of the fifth suit, including the 4s and 5s noted above.
- New hybrids and shrines that include the fifth suit.
- Pairs: Cards that count as two different suits (as opposed to hybrids that count as only either).
Some mini-expansions I've been thinking about as small bundles:
- Thieves: Upon revealing a thief in your pond, you may take one card from an opponent's pond or river and place it in your pond or river. Each thief in your pond gives you an increasing penalty, though. (-1, -3, -6, -9, 15)
- Villagers: Each villager has a particular desire to see certain koi and will award you points if you meet their demand. For example, "4 points if you have three red koi in your pond." Keep villagers in your pond from until the end of the game, even after scoring. So they may score multiple times
- Ribbons: There are tons of new ribbons that could be added to the game. I've talked about them here, but I'll list them again for convenience.
- Win a round scoring koi in all four suits.
- Win a round without using a cat, crane or turtle.
- Win a round scoring koi of only one suit.
- Win a round scoring only scoring with a cat, crane or turtle.
- Win a round with the most Koi of X suit in your house.
- Win a round without drawing cards from the lake.
And so forth. Lots to do!