Rules Index | GM Screen

Bestiary / Monster Advancement / Adding Racial Hit Dice

Step 1: Plan the Monster

Source Pathfinder RPG Bestiary pg. 295
When advancing a monster by adding racial HD, you should start by deciding what you want the monster to become. In most cases, this means merely a tougher, stronger version of an existing monster. Note the desired CR of the new monster. This is also the point at which you should decide whether the creature is going to increase in size. As a general rule, creatures whose Hit Dice increase by 50% or more should also increase in size, but GMs should feel free to ignore this rule if warranted by the individual creature or situation.

Archives of Nethys

Rules Index | GM Screen

Step 1: Plan the Monster