Undead Fortitude. If damage reduces the Zombie Champion to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the Zombie Champion drops to 1 hit point instead.

Remanescent of Prowess (3-day):. The Zombie Champion has carved in its body the movements and tecniques of its living past, once per turn it can turn a miss whit a melee weapon attack into a hit.

Remarcable Athletic: The Zombie Champion has advantage on Strength and Dexterety saving throws, as well as acrobatics and atletics skill checks. 

Multiattack: The Zombie soldier can attack twice with its war axe attack and thrice whit its slam attack if he loses its War Axe.

Slam: Melee weapon attack +9 to hit, 5ft range, one target for 2d6+6. bludgening damage

War Axe: Melee weapon attack +9 to hit, 5ft range, one target for 2d8+6 slashing damage

Shield Bash: Melee weapon attack +9 to hit, 5ft range. one target, 1d6+6 bludgening damage, on a critical hit a creature hit by this attack must succeed a DC 17 Strength Saving Throw or be pushed 10ft away and be stunned until the start of its next turn.

Rush: The Zombie Soldier can take a Dash action as a bonus action

Perry: The Zombie Champion can as a reaction increase its AC by +2 agaisnt a melee attack.

Raise the Shield: The Zombie Champion can as a reaction increase its AC by +2 agaisnt a ranged weapon attack,