Vulnerability
The creature takes half again as much damage (+50%) when it takes damage of a specific type. Creatures with a vulnerability to an effect that doesn’t deal damage instead take a –4 penalty to saves against spells and effects that cause or use the listed vulnerability (such as enchantments). Some creatures might suffer additional effects, as noted in their stat blocks.
Format: Weaknesses vulnerable to fire.
Source
Alien Archive pg. 158
