The final aid I'll develop for adventuring in the Severnais is a set of random encounter tables. As before, I'm pulling in creatures from pretty much every game in my library to give encounters that sense of whimsy I enjoy.
I should also note that I have a set of Random Encounter Generation home rules that are consulted before I get to these tables. Over the years I've moved from most of my random encounters being combat and experience point oriented to designing a system that will generate information for the players about the area. What I have below are tables of challenges they may encounter, or they may just see evidence of and start looking over their shoulders for the monster to appear.
Encounter areas follow natural ecosystem and movement boundaries. Looking at the map of the Sverenais, I determined that there are four encounter areas.
North Dearthwood The area of the forest north of river flowing out of the Dearthwood into the Roglaroon and the tributary of the Conqueror's River as well as the Conqueror's river upstream from there. Looking at the Wilderlands of High Fantasy booklet, there are three "Lurid Lairs" listed in the area for Wood Nypmphs, Pixies and Hippogriffs. From that I have determined that I will use the "Fairy or Sylvan" table in AD&D and the "Elf Wood" table in Runequest when generating the appropriate encounters. I also ended up with two encounters from Call of Cthulhu in that area, so I've decided that the entire area is subject to planar instability, where 'nexus points' to use the Empire of the Petal Throne terminology naturally appear and enable all sorts of beings to enter the Wilderlands.
Victory Hills Not a canonical name, but what I'm calling the hills where the Conqueror's River rises. They extend up to the River Stillring, most of them are outside of the Severnais proper, so I can re-use them as an area when I detail the heartlands around the City State itself.
North of Severn and South of Severn The Severn provides a natural barrier to movement dividing the encounter areas.
Note that I'm leaving the actual boundaries of the encounter areas rather vague. These are all or almost all mobile creatures that can have overlapping ranges. Also, I can roll the encounter and if there's a reasonably close boundary, decide which challenge I want the party to encounter.
About half the challenge encounters are from AD&D and I expect are familiar to most readers, the source of others are indicated below.
|Roll||North Dearthwood||Victory Hills||North of Severn||South of Severn|
|1||Elf War Party (RQ)||Humanoid #4 (MA)||Centisteed (GW)||Snake Python|
|2||Chimera||NPC Party||Halfling||Changer (MA)|
|3||Al'mi-raj (FF)||Giant Skunk||Orc||Ankheg|
Lair Hex 2818 (5)
|Apparition (FF)||Gnome||Wild Dogs
Lair Hex 3515 (18)
|5||Star Spawn of Cthulhu (CoC)||Sphinx (ACKS)||Wild Horses
Lair Hex 3311 (12)
|6||Men, Bandit||Weretiger (ACKS)||Patrol||Men, Merchant|
|7||Bearoid (MA)||Giant Ant||Merchants (EPT)||Arn (GW)|
|8||Patrol||Wild Boar||Fire Lizards
Lair Hex 3011 (3)
|9||Cthonians (CoC)||Leprechaun||Yexil (GW)||Buzzers (MA)|
|10||Needlemen (FF)||Patrol||Llama (Dreamlands)||Rust Monster|
|11||Elf||Chénlh (EPT)||Men, Brigands||Wolves|
|13||Troll||Giant Stag Beetle||Basilisk||Throgrin (ACKS)|
Lair Hex 3318 (2)
|Men, Berserker||Goblin||Demon, Artificer (Infernum)|
|15||Pineto (GW)||Men, Dervish||Elf||Giant Centipedes
Lair Hex 3612 (10)
|16||Harpy||Elf||Url-worm (Dreamlands)||Sun Worm (WFRP)|
|17||Cockatrice||Men, Brigand||Men, Bandit||Rakox (GW)|
Lair Hex 3017 (40)
|Dark Fungus (MA)||Men, Merchant||Patrol|
|19||Su-monster||Rényu (EPT)||Giant Toads
Lair Hex 311 (11)
|20||Giant Stag||Hlýss (EPT)||Small Warrior (MA)||Wolves|