System

Adrenaline: When combat begins, a provoked action occurs, or force role must be taken, adrenaline kicks in and activates a second level games system. This is the system that allows players to ignore some outside influences (think pain, cold, etc) temporarily and to slow the world down for combat choices.

5E Vehicle Rules:
MSRD WIKI

Dnd 5E Rule Variants


Ability Checks

Modifying a Class

Players Companion Elemental Evil

When Armies Clash

System

Wings of Flight Revivalofhonor