“Why would a boulder suddenly start rolling toward an unwary traveler? How would it manage to go a little way up hill to pursue them? There’s something odd about theses stones, I’m telling you!” -Ol’ Man Bimminey, Town Drunk
“Rollers” are large mantis-like insects that form large boulders around themselves as a defense. They also use them to crush prey when they sense it nearby. The genesis of this unusual hunting technique can only be attributed to the wizard laboratories lost in the foothills.
Armor Class: 17 (stone)
Hit Points: 40
Damage Immunities: poison, psychic; bludgeoning, piercing, and slashing from nonmagical attacks that aren’t adamantine.
Material. The shell is an object made of stone.
Large Beast, unaligned
Armor Class: 13 (natural armor)
Hit Points: 37 (5d10+10)
Speed: 40 ft., fly 10 ft.
|16 (+3)||10 (+0)||14 (+2)||8 (-1)||6 (-2)||4 (-3)|
Senses: blindsight 10 ft., tremorsense 120 ft. (otherwise blind), passive Perception 8
Challenge: 3 (700 XP)
Enveloped. While its shell is intact, the roller has full cover and all attacks directed against it can only affect the shell. For each 2 points of damage greater than 10 the shell takes, the roller takes 1 damage as well.
Multiattack. The roller makes two claw attacks.
Claw. Melee Weapon Attack: +5 to hit, reach 10 ft., one creature. Hit: 10 (2d6+3) slashing damage.
Roll. When inside its stone ball, the roller can increase (or decrease) its speed in a given direction by 10 ft. (5 ft. if up hill and 15 ft. if down hill). This speed stacks round to round up to the roller’s speed (40 ft.) or half that speed up hill (20 ft.) for half that speed again if up hill (60 ft.). The shell is 15 feet in diameter. Whenever it enters a creature’s space or a creature enters its space while it’s rolling, that creature must succeed on a DC 15 Dexterity saving throw or take 1d10 bludgeoning damage per 5 ft of speed the ball has in the direction of entry.