Dauthi Jackal

• WWizards of the Coast2004-10-04
  Official Ruling
  This creature does not have to be an attacker or blocker to use its ability.
• WWizards of the Coast2021-03-19
  Official Ruling
  Multiple instances of shadow on the same creature are redundant.
• WWizards of the Coast2021-03-19
  Official Ruling
  Once a creature has been blocked, that creature remains blocked and will deal and be dealt combat damage even if it gains or loses shadow or if the blocking creature gains or loses shadow.
• WWizards of the Coast2021-03-19
  Official Ruling
  If an attacking creature has multiple evasion abilities, such as shadow and flying, a creature can block it only if that creature satisfies all of the appropriate evasion abilities.

Rulings via Scryfall