If we were going to give the latest Pathfinder Bestiary a proper Hollywood sequel title, we could do worse than Bestiary 6: The Rehabilitation of the Ooze. Every Bestiary engages in certain projects, and one of B6’s is trying to figure out what to do with the Ooze subtype now that we already have five monster hardcovers under our belts.
The creation of blights is one answer—we’ve got our first blight coming soon, actually—and highly intelligent, high-CR threats like the mezlan is another. Blurring the line between ooze and construct (with a dash of undead thrown in), a mezlan is an ooze created from the consciousness of a willing volunteer. Nearly impossible to kill and often retaining their class levels, mezlans were the elite spies and shock troops of a long dead civilization. Now they are among the last remnants of that civilization—some still carrying out old missions, others trying to find purpose in a world that has moved on.
For players and PCs of a philosophical bent, mezlans raise questions about the nature of consciousness and humanity. And because the techniques needed to create them have been lost, mezlans are a reminder that some secrets will always remain in the past…and probably should stay that way.
Told to seek a scion of the river god Proteus, adventurers instead encounter a mezlan posing as a shapeshifting ichthyocentaur. If the adventurers have acquired the right symbols its fallen empire, the mezlan treats them as elite agents and begins reciting a millennia-old message. But it will allow no one entrance into the temple it guards—even if the message instructs the adventurers to proceed inside.
The rivalry between the Golden Imperium of Nal, the first and greatest human empire, and the elven league of the Vith T’shir was a long and bitter one. No less than three mezlans were created to kill the five elven royal families (for a sum that quite literally beggared a Golden colony and cost Nal its embassy on the Elemental Plane of Earth). One was destroyed; the other is presumed to have followed the Vith Pana when they sailed to the Morninglands. The third is still missing, and some elf scholars hope to interrogate it so they can learn secrets about the Vith T’shir they themselves have forgotten.
A mezlan operates an orbiting android manufactory—nevermind that no orders have come through in more than a century. The mezlan sees her fluid form and dim memories of her natural life as proof that she is superior to the machinefolk she creates and tinkers with. The presence of organic living creatures or proof of android souls (such as an android capable of casting divine spells) call that superiority into question and may drive her to violence.
—Pathfinder Adventure Path #66 90–91 & Pathfinder Bestiary 6 186–187
(Note that at time of writing, the link to the mezlan’s OGC stats is cranky, but I’ll link above anyway.)
Not long ago I finally finished watching my first ever Star Trek series, Deep Space Nine. Mezlans would serve pretty well for the Dominion’s Founders.