White Cell Stalk

The White Cell Stalk is encountered alongside the Mammoth Cyst during the third quest in the Darkest Dungeon. It plays a support role for the Cyst, displacing party members, healing, and buffing when its health gets low. It has one particularly nasty trick up its sleeve: a Teleport ability which sends the party into a random dead-end room on the map.

Behavior
Obviously, the main threat here is the Teleport ability - while it causes no damage to your heroes in and of itself, it still causes you to lose time and stack up Stress and Health damage as you are forced to fight your way back to where you started. However, Teleport will not reset the battle you were beamed away from: if you return to fight the Cyst and Stalk again, they'll be at the same health they were when you left.

Teleport will never be used on the Stalk's first turn: it has a -100000000.0 chance modifier. Each round thereafter, the chance of it using said skill will increase by 7.0, stacking up on the next rounds with a base chance of 4.0 (that means, for instance, that at round 3 there will be a 4+ (2*7)=18.0% chance for the Stalk to Teleport your heroes away from the fight). You can reset the timer by killing the Stalk - although the Mammoth Cyst will summon in a replacement, it will help buy you some time.

Both Displace and Reconstitute have, on any given turn, a chance of 25% of being used. However should either of the monsters's HP value be under 50%, there will be an added 50% probability of it using 'Reconstitute. Likewise, if the Mammoth Cyst is on low health, the Stalk becomes 10 times more likely to target it with Reconstitute.