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Leech, Giant

Source Ultimate Magic pg. 36
Companion Type Vermin
Monster Entry Link
A parasite ballooned to monstrous proportions undulates in the muck, its circular maw a spiral of teeth.
Starting Statistics: Size Small; Speed 5 ft., swim 20 ft.; AC +0 natural armor; Attack bite (1d4 plus attach); Ability Scores Str 9, Dex 14, Con 12, Int —, Wis 10, Cha 1; Special Attacks attach, blood drain (1 Str); Special Qualities amphibious, blindsense 30 ft., scent, susceptible to salt; CMD can't be tripped.

7th-Level Advancement: Size Medium; Attack bite (1d6 plus attach); Ability Scores Str +2, Dex -2, Con +2; Special Attacks blood drain (1 Str and 1 Con damage); Special Qualities blindsight 30 ft..