Rune-Brand Juggler

• WWizards of the Coast2024-02-02
  Official Ruling
  When an effect suspects a creature, it becomes suspected. It gains menace and "This creature can't block" for as long as it's suspected. It stays suspected until it leaves the battlefield or another effect causes it to no longer be suspected.
• WWizards of the Coast2024-02-02
  Official Ruling
  If a creature is already suspected, suspecting it again won't have any effect.
• WWizards of the Coast2024-02-02
  Official Ruling
  If a suspected creature loses all abilities, it will lose menace and "This creature can't block", but it won't stop being suspected.
• WWizards of the Coast2024-02-02
  Official Ruling
  If Rune-Brand Juggler is suspected, you can sacrifice it to pay for its own last ability.
• WWizards of the Coast2024-02-02
  Official Ruling
  Being suspected isn't a copiable value. If a permanent becomes a copy of a suspected creature, it won't be suspected.
• WWizards of the Coast2024-02-02
  Official Ruling
  There's no limit to the number of creatures that can be suspected simultaneously. Suspecting a new creature doesn't cause other creatures to stop being suspected.

Rulings via Scryfall