This brown–and–yellow sludge appears to be made of multiple smaller globules churning in a disgusting communal mass.
Undigested Swarm CR 5
Source Bestiary 5 pg. 258
XP 1,600
NE Tiny undead（swarm）
先攻 +3；感官 darkvision 60 尺；察觉 +8
防御
AC 17，touch 16，flat–footed 13（+3 敏捷，+1 dodge，+1 natural，+2 size）
HP 54（12d8）
强韧 +4， 反射 +9， 意志 +9
防御能力 amorphous，swarm traits；免疫 undead traits；抗性 acid 10
进攻
速度 30 尺，climb 20 尺，swim 20 尺
近战 swarm（3d6 plus digest and distraction）
占据 10 尺， 触及 0 尺
特殊攻击 digest，distraction（DC 16）
属性
力量 4， 敏捷 16， 体质 —， 智力 3， 感知 9， 魅力 11
Base Atk +9；CMB —；CMD —
专长 Dodge， Improved 钢铁意志， 钢铁意志， Lightning Reflexes， Mobility， Skill Focus（察觉）
技能 Climb +14，察觉 +8，Stealth +17，Swim +14
语言 Common（can't speak）
生态
环境 any
组织 solitary，pack（2–5），or infestation（6–12）
宝物 none
特殊能力
Digest（Ex）A target that takes swarm damage from an undigested swarm is covered in acidic slime and must succeed at a DC 16 Reflex save or take 2d6 points of acid damage for 1d4 rounds at the start of its turn. An affected creature can make a new save as a full–round action. Washing off the acid grants a +4 bonus on this save. The save DC is Constitution–based.
Whereas individual undigested are more of a nuisance than a threat to adventurers，a swarm of such creatures can be dangerous to even experienced adventurers. An undigested swarm comprises hundreds of individual undigested. Driven by insatiable hunger，they fall upon and consume any living creatures crossing their path，surrounding the unfortunate victims and drenching them in acidic slime，digesting their still–living prey even before the screaming ends.