Action Surge (Recharges when Yautja Finishes a Short or Long Rest). On his turn, Yautja can take one additional action.

Camouflage. Yautja camouflage with the surroundings

Alien regeneration. When Yautja takes damage that reduces him to 0 hit points, he immediately regains 20 hit points. If he has 20 hit points or fewer at the end of his next turn, he dies.

Spellcasting. The Yautja is a 8-level spellcaster. Its spellcasting ability is Charisma (spell save DC 18, +10 to hit with spell attacks). The Yautja has following Warlock spells prepared:
Cantrips (at will), : [spell]Eldricht Blast

Yautja1st level (4 slots): shield*

2nd level (3 slots): invisibility

4th level (2 slots): Greater invisibility

7th level (1 slot): teleport

Multiattack. Yautja attacks twice with his spikes or spear, or makes two blast ranged attacks with his innate ability.

Action Melee Attack. Melee Weapon Attack: +10 to hit, reach 5 ft., 1 target. Hit: 20 (3d8 + 8) slashing damage. 

Action Ranged Attack. RangedWeapon Attack: +10 to hit, range 200/200 ft., 1 target. Hit: 22 (3d8 + 10) force damage.

Explotion. Before dying as reaction Yautja explodes in a radius of 60feet causing 10d6 of force damage.