Unruly Krasis

• WWizards of the Coast2024-02-02
  Official Ruling
  Unruly Krasis's second ability will overwrite any previous effects that set the creature's power and toughness to specific numbers. Effects that otherwise modify its power and toughness will still apply no matter when they took effect. The same is true for +1/+1 counters.
• WWizards of the Coast2024-02-02
  Official Ruling
  You can always activate an ability that will cause a creature to adapt. As that ability resolves, if the creature has a +1/+1 counter on it for any reason, you simply won't put any +1/+1 counters on it.
• WWizards of the Coast2024-02-02
  Official Ruling
  The value of X is determined only once, as Unruly Krasis's second ability resolves. Further changes to Unruly Krasis's power that turn won't cause the target creature's base power and toughness to change.
• WWizards of the Coast2024-02-02
  Official Ruling
  If a creature somehow loses all of its +1/+1 counters, it can adapt again and get more +1/+1 counters.

Rulings via Scryfall