In a dedicated artifact deck, though, Inspiring Statuary can do some straight-up unfair things, including allowing one to cast Ulamog, the Ceaseless Hunger for zero mana
You could write entire best-of articles for constructs, equipment, mana rocks, myr, thopters, and so on (and we have!), so check those out for more comprehensive lists of those individual types of cards
Richard Garfield [the creator of Magic: The Gathering ] thought they were neat
The earliest example of such a card is Wrath of God all the way back in the first Magic set, Limited Edition Alpha
Whenever a creature an opponent controls with a counter on it dies, you create a tapped Treasure token