Concept: “The drowned shamble aimlessly along shorelines seeking to steal the life-breath they so desperately desire.”
Content: An undead denizen for coastal settings
Writing: Sets the tone and scene for encounters
Art/design: Relatively subtle and unintrusive
Usability: Well-demarcated sections and stats for easy reference

Concept: “These spirits hunger for a life lost, love stolen.”
Content: A persistent undead pest
Writing: Efficiently conveys special mechanics and hooks
Art/design: Relatively lean but adds some character
Usability: Small but relatively tough to kill

Concept: “The rotting flesh of the long-dead forms together into an obscene facsimiles of life.”
Content: A patchwork bog-beast
Writing: A balance of mechanics and flavor
Art/design: Colors convey the setting; typographical choices create a sense of escalation
Usability: Has an especially brutal (but limited) special attack