Encounters might be a meeting with a patrol of guards at an old shrine or a familiar looking for aid. It might be an ambush in the wilderness, a stand-off in the city or a monster in the Underdark.
At a towering ice cap with a pondThey are marked by a power of good fortuneIn a fight they attack whoever is nearestDifficulty... 400 Deadly
At a ridge of melting ice. There is a patch of cultivated cotton grass. the area is covered with virgin snow. There are recent footprints in the snowThey are waiting for someoneIn a fight they attack whoever is nearestDifficulty... 200 Medium
At a rough trail. It is a dead magic zone (similar to an antimagic field)They are are on a raid or questIn a fight they use ranged attacks and try to keep in coverPossibly... during the fight someone notices a large fire nearbyDifficulty... 450 Deadly
At a sheet of permafrostThey are marked by a local factionIn a fight they attack whoever is nearestDifficulty... 150.0 Easy
At a high waterfall and a patch of cotton grass. a storm is approachingThey are eatingIn a fight they attack whoever is nearestDifficulty... 200 Medium
5e Encounters bundle, 11 pdfs on DMs Guild