Tuesday, November 25, 2025

Creature Preview: Warrener and Xorn

Two of the coolest monsters adventurers are likely to meet underground are the warrener — built from D&D’s umber hulk — and the xorn. Both are weird looking, not necessarily a threat unless you end up annoying them (intentionally or otherwise), and far more sapient than their appearance suggests.

The umber hulk was considered product identity in the original days of the Open Game license (as with the displacer beast). But with the movement of the Dungeons & Dragons SRD into Creative Commons, there are no prohibitions on a game built around the chassis of D&D (as CORE20 proudly is) from getting their umber hulk on. That said, that name always seemed a little meh to me, so “warrener” takes its place — from the way the relentless digging of these creatures creates warrens that wary underground adventurers learn to watch for and avoid.

One big update made to the warrener involves replacing the umber hulk’s confusion gaze with a slowing gaze. The confusion effect of the umber hulk always seemed a bit strange as an evolutionary defensive or offensive strategy, given that a creature under its effect is just as likely to attack the umber hulk as to flee them or stand fast. By slowing other creatures, the warrener is in a better position to catch up to prey, or to evade threats or creatures they just want to ignore.

(Click on the stat block header below to download the full stat blocks in PDF.)

Stat block headers for the warrener and the xorn.



Tuesday, November 18, 2025

Creature Preview: Cyclops

When D&D was in its earliest days, giants were the well-known core of the so-called “true giants” — hill giants, fire giants, frost giants, stone giants, cloud giants, and storm giants — alongside lesser “giant-like” creatures such as ettins and ogres. As the game expanded, it made “giant” into a formal creature type and added other folk to that type. But in so doing, it created a kind of schism in the giants, whereby folk such as cyclopses and fomorians couldn’t be a part of the core identity because they were effectively an afterthought to it.

For both the fomorians (still awaiting final development) and the cyclops, I wanted to work with the idea that they were effectively peers of the core six giant peoples (renamed in CORE20 as the hallaek, the wiirdhar, the fiirmar, the rohkhad, the clohmad, and the istruhmad, because having sapient creatures with advanced and ancient cultures named in the languages of other cultures is part of that colonialism thing that D&D has long struggled with). But even as peers, cyclopses and fomorians (as athachs, ettins, and ogres) needed to be set up as outcasts from the core giant culture in some way. 

The specific angle for the cyclops and fomorians that appealed to me is that they have a connection to druidas magic, which traditionally isn’t part of the whole giant magical oeuvre. As such, the idea is that the giants have an overall ancient arcane tradition, but those two subgroups started messing around with nature magic and ended up splitting off from the giants’ central culture as a result.

(Click on the stat block header below to download the full stat block in PDF.)

Cyclops stat block header.



Monday, November 3, 2025

Creature Preview: Praetyrian and Venenatus

Two new drakes — lesser dragons related to the true dragons — are set to appear in the upcoming CORE20 Playtest Creature Package update. The praetyrian is built around the guard drake of D&D 5e, but felt like they needed a less mundane name name. The venenatus is a brand-new creature created for CORE20 — a drake who feeds on magic, often of the sort carried by characters. 

When I wrote the first version of the venenatus (colloquially known as the dweomer drake) for a campaign, it was an original-to-me concept. The Forgotten Realms dweomervore (a similar theme, but very different execution) came to my attention only afterward, with the venenatus mostly inspired by the magic-eating disenchanter (another creature I use a lot, much to my players’ dismay).

(Click on the stat block header below to download the full stat blocks in PDF.)

Stat block headers for the praetyrian and the venenatus.


More Playtest Monsters

As of right now, the v1.1 update to the CORE20 Playtest Creature Package is live for your gaming pleasure! As always, you can find the new ...