Take Action

BiteThis bite attack can be used by a dnd 5e creature to make a Melee weapon attack: +4 to hit, reach five feet, and one creature. It also deals 4 (1d4 + 2) piercing damages, and the target must succeed on a DC 11 Constitution saving throw. Otherwise, they will take 10 (3d6) poisoning damage.

If the target has poison damage, it must be reduced to 0 Hit Points. The target then becomes stable but poisoned for at least an hour.

Also, read young brass dragon 5e monster

Attributes of Giant Centipede Monster DnD5E

AC 13 (Natural Armor).
Alignment Unaligned
CHA 3
CON 12
Challenge Rating 1/4
DEX 14
HP 4 (1d6+1).
INT 1
Passive Perception 8
Roll 0 Take 1d20 and 4 1d4+2
STR 5
Senses Blindsight 30 Ft.
Size Small
Speed 30 ft. climb 30 ft.
Type Beast
WIS 7