adding sand strider, fixing statblock css

deadsands/sources/psychadelic_effects.yaml

@@ -23,7 +23,7 @@ Effect:
     - Why do we have to keep doing things? Doing things is hard.
     - Your movement speed is reduced by 10ft and you cannot use reactions. Advantage on saves against psychic effects.
   - Horror:
-    - You have stared into the abyss of your soul and only blackness awaits you.
+    - You have stared into the abyss of your soul and found only blackness.
     - Frightened by all creatures. Disadvantage on all saves against psychic effects.
   - Mania:
     - You are possessed by feverish mania; ideas and words tumble out of as quickly as possible. You cannot stop them.