After all your hard training and experience in military arts you've gained a masters focus in the heat of battle, allowing you to pull off extraordinary tactics.

• uses: 1 + half (rounded up) of Initiative bonus.
• effect: grants an additional bonus action or an additional reaction when a reaction/ bonus action is used. (only one or the other & only once per round per use of this feat)

notes:

• to recharge uses; must take a long rest. after a long rest, flip a coin to determine amount recovered [heads = 2 uses, tails = 1 use] 
• can only use this feat for non-magical movement and weapon attacks
• must be of the barbarian, fighter, monk, rogue, paladin, or warlock classes to acquire this feat
• cannot have this feat in addition to the Mages Initiative feat.