You gain resistance to fire damage, and difficult terrain caused by sand, dust, or similar terrain doesn't cost you extra movement.
You gain resistance to cold damage, and difficult terrain caused by ice, snow, or similar terrain doesn't cost you extra movement.
You gain proficiency with light armor, shields, and one martial weapon of your choice.
You are considered one size larger when determining your carrying capacity.
You can expend an action point to halve fall damage.
You can hold your breath for twice as long.
You have advantage on checks and saves against environmental features.