Undead Fortitude. If damage reduces the zombie 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 drops to 1 hit point instead.

Keen Smell: The lion has advantage on Wisdom (Perception) checks that rely on smell.

Pack Tactics: The lion has advantage on an Attack roll against a creature if at least one of the lion's allies is within 5 ft. of the creature and the ally isn't Incapacitated.

Pounce: If the lion moves at least 20 ft. straight toward a creature and then hits it with a claw Attack on the same turn, that target must succeed on a DC 15 Strength saving throw or be knocked prone. If the target is prone, the lion can make one bite Attack against it as a Bonus Action.

Running Leap: With a 20-foot running start, the lion can long jump up to 15 ft.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) piercing damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d6 + 5) piercing damage.