race features:
As a reaver dwarf, you're well suited to the harsh life in the lands of Norheim and have learned to work with your brethren to take down even the largest mammoth:
Pack Tactics
You have advantage on an attack roll against a creature if at least one of your allies is within 5 feet of the creature and the ally isn't incapacitated.
Mountain Born
You’re acclimated to high altitude, including elevations above 20,000 feet. You’re also naturally adapted to harsh cold climates.