d100 Encounter
35 – 38 1 giant toad
39 – 41 1d6 + 2 constrictor snakes
42 – 44 2d4 giant frogs
45 1d8 + 1 swarms of rats or 1d6 + 2 swarms of ravens
46 – 48 2d10 stirges
49 – 52 2d6 + 3 bullywugs
53 – 54 1d8 + 1 orcs
55 – 56 1d4 yuan-ti purebloods
57 1 druid
58 – 59 1 yuan-ti malison
60 – 62 1 giant constrictor snake
63 – 64 A high-pitched shriek that lasts for 1d4 minutes
65 – 67 2d4 lizardfolk
68 – 69 1d4 ghouls
70 – 71 1 will-o'-wisp
72 1 wight
73 1 ghast
74 – 75 1 swarm of poisonous snakes
76 – 77 A foul stench bubbling up from brackish waters
78 – 80 1d4 + 2 ogres
81 – 83 1 shambling mound
84 – 86 1 lizardfolk shaman with 1d6 giant lizards and 2d10 lizardfolk
87 1 troll
88 – 89 1d4 green hags
90 – 91 1 revenant
92 – 93 1 giant crocodile
94 – 95 1 orc Eye of Gruumsh with 1d3 orogs and 2d6 + 3 orcs
96 – 97 1 young black dragon
98 1 yuan-ti abomination
99 1d4 water elementals
00 1 hydra
Swamp Encounters (Levels 5–10)
d100 Encounter
01 1 green hag