When each arena's battle step starts, each player may choose one of his or her unique units in that arena. If a player does, he or she chooses either Inpiration or Intimidation. That player's chosen unit gets the chosen ability until end of turn
Keywords
Intimidation
Intimidation: An isolated, static ability that means, "This unit gets +10 speed, +1 power, and +1 health for each of your opponent’s units in this arena."