At 1st level, you understand two cantrips of your decision from the artificer spell list. At higher levels, you study further artificer cantrips of your choice, as demonstrated within the Cantrips column with the Artificer table. The Armorer 5e subclass has a whole lot to supply, starting with major armor https://halforcfighter25689.pointblog.net/die-or-dice-fundamentals-explained-69311225