Chimeric Mass enters with X charge counters on it. {1}: Until end of turn, Chimeric Mass becomes a Construct artifact creature with "This creature's power and toughness are each equal to the number of charge counters on it."
Etched Monstrosity enters with five -1/-1 counters on it. {W}{U}{B}{R}{G}, Remove five -1/-1 counters from Etched Monstrosity: Target player draws three cards.
Multikicker {2} Everflowing Chalice enters with a charge counter on it for each time it was kicked. {T}: Add {C} for each charge counter on Everflowing Chalice.
Whenever another artifact you control enters, you may have Glint Hawk Idol become a 2/2 Bird artifact creature with flying until end of turn. {W}: Glint Hawk Idol becomes a 2/2 Bird artifact creature with flying until end of turn.
When Precursor Golem enters, 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.