Swarm.
The swarm can occupy another creature’s space and vice-versa. It has advantage on ambush attacks.
Skittering Horror.
Creatures that start their turn in the swarm’s space must succeed on a DC 11 Wis save or be frightened until the start of their next turn.
Bite Swarm.
Melee Weapon Attack: +5 to hit, reach 0 ft., one target in the swarm’s space.
Hit: 10 (4d4) piercing damage, or 5 (2d4) if the swarm has half HP or fewer.
Skeletal Scramble (Recharge 5–6).
The swarm spreads thin and rapidly shifts around.
Creatures in a 10 ft radius must succeed on a DC 12 Dex save or take 7 (2d6) slashing damage and have disadvantage on attack rolls until the end of their next turn.
Bonus Action Name. Enter the description for how bonus actions work for your monster here.
Reaction Name. Enter the description for your action.
Enter the description for how legendary actions work for your monster here.
Legendary Action Name (Costs # Actions). Enter the description for your legendary action.
Mythic Action Name. Enter the description for how mythic actions work for your monster here.
Mythic Action Name (Costs # Actions). Enter the description for your mythic action.
Description
At first you hear it: a faint tapping, like tiny bones drumming on concrete. Then the swarm appears—a wave of skeletal mice pouring through cracks and gaps, weaving together into a rattling tide of death.
Their empty eye sockets glow faintly, and their tiny fangs chatter in unison.
They move unnaturally, as if held together by flickering darkness. When they crawl over your boots, you feel cold, weightless fear prickling up your legs.
Lair and Lair Actions
Enter a description of your monster's lair here.
Lair Actions
On initiative count # (losing initiative ties), the [monster name] takes a lair action to cause one of the following effects; the [monster name] can’t use the same effect two rounds in a row:
- Enter a description for a lair action.
- Enter a description for a lair action.
Regional Effects
The region containing a legendary [monster name]’s lair is [enter the effect description], which creates one or more of the following effects:
- Enter a regional effect description.
- Enter a regional effect description.
If the [monster name] dies, these effects fade over the course of #d# days.
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