5etools Note. Leosin Erlanthar is presented in Hoard of the Dragon Queen as a half-elf monk. The martial arts adept stat block from Volo's Guide to Monsters has been provided here for ease of use.
Unarmored Defense. While the adept is wearing no armor and wielding no shield, its AC includes its Wisdom modifier.
Multiattack. The adept makes three unarmed strikes or three dart attacks.
Unarmed Strike. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:7 (1d8 + 3) bludgeoning damage. If the target is a creature, the adept can choose one of the following additional effects:
Dart. Ranged Weapon Attack: +5 to hit, range 20/60 ft., one target. Hit:5 (1d4 + 3) piercing damage.
Deflect Missile. In response to being hit by a ranged weapon attack, the adept deflects the missile. The damage it takes from the attack is reduced by 1d10 + 3. If the damage is reduced to 0, the adept catches the missile if it's small enough to hold in one hand and the adept has a hand free.