Spider Umbrella

I'm sure some of you remember this wild viral video.  Seems like a tool any good evil genius or crime lord with advanced tech would have. 

Spider Umbrella

Small Construct, Unaligned

Armor Class: 14

Hit Points: 50

Speed: 40  ft., Climb 40 ft.

Challenge: 4

STR:  12 (+1), DEX: 18 (+4), CON: 13 (+2), 

INT: 10 (+0), WIS: 10 (+0), CHA: 9 (-1)

Saving Throws:  Con+2

Skills: Stealth +6

Damage Immunities: Psychic, Poison

Condition Immunities: blinded, charmed, deafened, exhaustion, frightened, petrified poisoned

Senses: Blindsight 10 ft., Darkvision 60 ft., Passive Perception: 10

Languages: Understands but does not speak any language programmed into its memory

Unique Traits:

False Appearance: When the spider stays immobile it appears identical to a normal umbrella.

Spider Climb: The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. 

Actions:

Muliattack: The spider can make 4 talon attacks. 

Talon: Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d4+4) piercing damage.

Self Destruct: Every creature within 15 ft. of the spider must make a DC 14 Dexterity saving throw or take 28 (8d6) fire damage; half on a successful saving throw. The spiders hit points immediately drop to 0.