Spider Climb. The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Web Sense. While in contact with a web, the spider knows the exact location of any other creature in contact with the same web.
Web Walker. The spider ignores movement restrictions caused by webbing.
Very Boring. The Bore Spider has advantage on attacks against any creature it has mounted, and any creature it has mounted has disadvantage on strength saving throws against the Bore Spider.
Multiattack. The spider makes two attacks with its forelimbs.
Forelimbs. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 8 (1d10 + 3) piercing damage, and the creature must make a DC 13 Strength Saving throw or be mounted by the Collar Spider.
Bore. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 7 (1d8 + 3) piercing damage, and the target must make a DC 13 Strength saving throw, taking 26 (4d10+4) slashing damage on a failed save as the Bore Spider disappears inside them, or half as much damage on a successful one.
Nest (From within a creature only). The Bore spider lays a clutch of (1d6) eggs within the enemy and exits the enemy to an adjacent square. These eggs will gestate in 1d4 hours, at which point the target must make a constitution saving throw (DC 12+amount of eggs) or become infested for 7 days. The target can repeat the saving throw each dawn, ending the effect on a successful save, but the DC raises by 1 for each day past 3. Also on day 3, the target will take 2d10 piercing damage at each dawn, and the damage increases by 1d10 per passing day.
At dawn on the 7th day, 1d6 Bore spiders burst from the afflicted creature, dealing 78 (12d10+12) slashing damage.
Description
Bore Spiders are Small sized Spiders which can be found occasionally among other kinds of spiders, hiding in the crowds. They prefer to hunt in narrow tunnels with lots of small, low places to hide. When appropriate prey, such as a humanoid or other medium creature, walks past them, they will leap from the floor to the stomach or underbelly of their prey and latch on using sharp, hooked forelimbs. Once securely latched, it will spin its mouth in a circular motion, creating a hole through which it can enter its prey. A Bore spider will then begin to eat the creature from within, laying eggs if possible. a clutch of bore spiders usually number around 4, and will grow to be full sized within one week, at which point they will burst from the corpse.
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