Yautja

Cloaking Device - The yautja can turn invisible as an action as per the greater invisiblity spell.  If the yautja is hit by a critical hit, this device is disabled until it can be repaired, usaully after a long rest.

Helmet - This device improves the yautja's vision, allowing it to see in greater detail. It can see the creatures not emiting body heat, but has disadvantage on any Wisdom (Perception) checks against them.

Legendary Resistance (3/Days) - If the yautja fails a saving throw, it can choose to succeed instead.

Self Destruct - When the yautja falls to 0 hit points, it can choose to set off a explosive device. It detonates in 1 minute. All creatures must make a DC 15 saving throw, taking 55 (10d10) fire damage on a failed save or half as much on a successful one. The yautja and all of it's belongings are destroyed within the radius of the explosion.

Thermal Vision - The yautja has infravision and can see heat patterns. However, the yautja cannot see any creatures that are not emiting heat.

Multiattack - The yautja makes two wristblade or spear attacks.

Wristblade - Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 8 (1d6 + 5) [Slashing] damage. 

Spear - Melee  or Ranged Attack: +9 to hit, reach 5 ft. or range 20/60., one target. Hit: 8 (1d6 + 5) [Piercing] damage or 9 (1d6 + 5) [Peircing] damage if used with two hands

Action Ranged Attack. Ranged Weapon Attack: +6 to hit, range 20/60 ft., one target. Hit: A Large or smaller creature hit by the net is restrained until it is freed. A net has no effect on creatures that are formless, or creatures that are Huge or larger. A creature can use its action to make a DC 15 Strength check, freeing itself or another creature within its reach on a success. Dealing 15 slashing damage to the net (AC 12) also frees the creature without harming it, ending the effect and destroyin the net. A creature that starts its turn restrained by the net takes 3 (1d6) [Slashing] damage.

Plasmacaster - Ranged Weapon Attack: +6 to hit, range 100/40 ft., one target. Hit: 22 (4d20) [Force] damage

The yautja can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time, and only at the end of another creature's turn. The yautja regains all spent legendary actions at the start of its turn

Attack - The yautja can make a wristblade or spear attack.

Hide - The yautja can take a hide action.

Reposition - The yautja can move up to half its speed.