Soltari Lancer

• WWizards of the Coast2008-04-01
  Official Ruling
  For a time, the ability that granted it first strike was a triggered ability. It has been restored to a static ability that applies continuously while the Lancer is attacking. There is never a time when the Lancer is attacking but doesn't have first strike.
• 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.
• 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.

Rulings via Scryfall