Sudden Shift
Source
Character Operations Manual pg. 70
Whenever you or an ally deal damage to an opponent within 60 feet of you, you can take a reaction to allow all allies within 60 feet of the opponent to take a guarded step as a reaction. All of the characters who took a guarded step using this improvisation have their speed reduced by 5 feet until the end of their next turn.
Dragonscript
ID
48601c04f89d22aeb25b713a