Pattern
Cannot use Fell on turn 1, and has a 50% chance of using Suck and a 50% chance of using Double Strike.
Afterwards, has a 40% chance of using Double Strike, a 40% chance of using Suck and a 20% chance of using Fell.
Cannot use Double Strike three times in a row, cannot use Suck three times in a row and cannot use Fell twice in a row.
It is stunned if the plated armor is reduced to zero, interrupting its current intent. Always uses Fell the turn after it's stunned.
In Ascension 17+, always starts with Fell on turn 1.
| Name | Intent | Effect | Asc 2+ |
|---|---|---|---|
| Double Strike | 
|
Deals 6 x 2 damage. | Deals 7 x 2 damage. |
| Suck | 
|
Deals 10 damage, gains HP equal to unblocked damage dealt. | Deals 12 damage, gains HP equal to unblocked damage dealt. |
| Fell | 
|
Deals 18 damage and applies 2  Frail.
|
Deals 21 damage and applies 2 Frail.
|
General Strategy
Due to Shelled Parasite's ability, it may be a good idea to use a high damage attack first in the turn, then hit as many times as possible once the 
Block is broken to lower its total stacks of 
Plated Armor, if unable to kill this turn.