Caprichrome

• WOTC Official Reminder Textofficial rules
  Vigilance — Attacking doesn't cause this creature to tap.
• WOTC Official Reminder Textofficial rules
  Flash — You may cast this spell any time you could cast an instant.

• WWizards of the Coast2021-06-18
  Official Ruling
  You may choose not to sacrifice any artifacts for the devour artifact ability.
• WWizards of the Coast2021-06-18
  Official Ruling
  If you cast this as a spell, you choose how many and which artifacts to devour as part of the resolution of the spell. (It can't be countered at this point.) The same is true of a spell or ability that lets you put a creature with devour artifact onto the battlefield.
• WWizards of the Coast2021-06-18
  Official Ruling
  Devour artifact is a variant of the devour ability. It allows you to sacrifice artifacts rather than creatures, but otherwise functions identically to devour.
• WWizards of the Coast2021-06-18
  Official Ruling
  All artifacts devoured this way are sacrificed at the same time.
• WWizards of the Coast2021-06-18
  Official Ruling
  You may sacrifice only artifacts that are already on the battlefield. If multiple creatures with devour abilities are entering the battlefield under your control at the same time, they can't devour the same objects. They can't devour each other, themselves, or any other objects entering the battlefield at the same time.

Rulings via Scryfall