The Brothers' War Retro Artifacts

Precursor Golem | Artifact Creature | Golem | When Precursor Golem enters the battlefield, create two 3/3 colorless Golem artifact creature tokens. Whenever a player casts an instant or sorcery spell that targets only a single Golem, that player copies that spell for each other Golem that spell could target. Each copy targets a different one of those Golems. | Chippy

Psychosis Crawler | Artifact Creature | Phyrexian Horror | Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life. | Stephan Martiniere

Self-Assembler | Artifact Creature | Assembly-Worker | When Self-Assembler enters the battlefield, you may search your library for an Assembly-Worker creature card, reveal it, put it into your hand, then shuffle. | Toraji