Monster: Spectre

Monster: Spectre

The spectre is a type of a hateful incorporeal undead. They possess some thematic disadvantages that many other undead creatures lack, even when they seem appropriate, so I'm happy to finally use them.

Monster: Death Slaad

Monster: Death Slaad

It's not a phase, mom!

When a gray slaad lives for a long time, it can go back into isolation and perform a mysterious ritual that imbues it with evil power. Death slaads are martial and magical death machines that are usually clad in magic armor and wield magic weapons (note that the sample stat block assumes and unarmed and unarmored slaad). They look exactly like gray slaads. What I find strange is that the next stage in the slaad's lifecycle loses this evil taint.

Monster: Gray Slaad

Monster: Gray Slaad

A green slaad that survives for some time can retreat into isolation and transform into a gray slaad with even more spell-like abilities. Interestingly, they have an innate ability to enchant items.

Monster: Green Slaad

Monster: Green Slaad

The green slaad is a result of an arcane spellcaster dying to a red slaad's implanted egg or a blue slaad's fever. They are more focused on their spell-like abilities. Their description and the illustration in the Monster Manual for D&D 3.5 seem to disagree on how the creature should look, but the illustration from the Monster Manual for D&D 5e seems much closer to the description.

Monster: Blue Slaad

Monster: Blue Slaad

The blue slaad is bigger than the red one, has very long talons, and can spead slaad fever to produce more red or green slaadi.

Monster: Red Slaad

Monster: Red Slaad

Slaads are chaotic-aligned outsiders that resemble humanoid toads. They have a peculiar way of reproduction and metamorphosis.

Monsters: Skeletons

Monsters: Skeletons

Here we have the sample skeletons from the Monster Manual for D&D 3.5. This is why I converted the troll before the rest of the monsters in the "S" section. The advanced megaraptor skeleton was based on the allosaurus from GURPS Lands out of Time.