Not to be confused with Dartz
Dart, pluralized Darts (ダーツ, Dātsu) in the Japanese version, is an archetype of EARTH Machine-Type monsters used by Sylvio Sawatari in the Yu-Gi-Oh! ARC-V anime.
So far, all revealed "Dart" cards are Level 5 or higher monsters. They seem to focus on quick beatdown tactics, Tributing themselves in order to power-up another "Dart", preferably "Ultimate Dart Striker", who will Special Summon the Tributed "Dart" monsters back from the Graveyard afterwards.