Chameleon Rogue (Lizardfolk)

Hit Points: 29(lvl 1) +3 (additional hit point per next lvl). Or 290(lvl 1) + 30 (additional hit point per next lvl) (490=lvl 5).

Assassinate. During its first turn, the assassin has advantage on attack rolls against any creature that hasn't taken a turn. Any hit the assassin scores against a surprised creature is a critical hit +1d6. 
Evasion. If the assassin is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, the assassin instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.

Moving: This unit can move 30ft on the walls.

Multiattack. The assassin makes two shortsword attacks. 
Shortsword. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) piercing damage.

Find/Disarm Traps: The Rogue got +1d10 for searching for a trap and +1d10 for disabling it (lvl 1.)

Sneak attack: This passive ability allows this unit to do bonus damage +1d6 when attacking units that are not attacking it back. (lvl 2.)

Cloaking: Allows this unit to become hidden from enemies, last unit take damage or is made attack, or is spotted, can be used three time per day (lvl 3.)

Improved Sneak Attack: : This passive ability allows this unit to do bonus damage +4d4  when attacking units that are not attacking it back. (lvl 4.)

Crippling Blow:  This ability allows the Chameleon Rouge to deliver a strike that substantially reduces the target's resistance for a period of time, rendering them vulnerable attack. Toch spell, doesn't break them from a Cloak, deal 1d12 posting damage at a moment and 1d4+1 each turn, the target also take additional 1d6 for each additional damage it get. (lvl 5.)

Challeng rating go lvl1-5, lvl2-5, lvl3-5, lvl4-6, lvl5-6.

Lvl1= Can use lvl1 skills 

Lvl2= Can use lvl1 skills, 1 lvl2 skills

Lvl3= Can use lvl1 skills, 2 lvl2 skills. 1 lvl3 skills.

Lvl4= Can use lvl1 skills, 3 lvl2 skills. 2 lvl3 skills. 1 lvl4 skill.

Lvl5= Can use  lvl1 skills, 3 lvl2 skills. 3 lvl3 skills. 2 lvl4 skill, 1 lvl5 skill.

This unit cannot use different spelling different spell slots, his lvl1 skill doesn't require a slot to use it. All of skill reset after a short rest, after a long rest he use Cloaking automatically if he is lvl3.