+1 Dexterity or Constitution, Speed Increase, Dash over Difficult Terrain, Agile Movement
Type: General Feat
Prerequisite: Level 4+, Dexterity or Constitution 13+
Repeatable: No
Link: Link to source
You gain the following benefits.
Ability Score Increase. Increase your Dexterity or Constitution score by 1, to a maximum of 20.
Speed Increase. Your Speed increases by 10 feet.
Dash over Difficult Terrain. When you take the Dash action on your turn, Difficult Terrain doesn’t cost you extra movement for the rest of that turn.
Agile Movement. Opportunity Attacks have Disadvantage against you.