Atlantis, City of the Sea Dragon reduces all monster Levels in both players hands and fields by 1, to really mess up your opponents Extra Deck Summoning plans
Others claim it's an amalgam of many scarecrows, all constructed from the remains of a single treefolk, whose vengeful spirit persisted long after death and joined these separate beings together
It's the only other disruption Nordics have so running just 1 is okay
Like, there are several different special card types that allow opponents to draw two prizes upon a knock out, but they otherwise have zero mechanical connection between them
When they do, you can choose to give one of their leader or character cards 1000 power for the turn
Cumulative upkeep uses age counters to track the cumulative nature of the keywords costs