Darksteel Gargoyle

Nobody pays seven mana for the body here; the keyword is the entire transaction. Indestructible stapled to a flier turns a defensive sweeper into a blunt instrument: wrath the board, send everyone else's creatures to the graveyard, and this one keeps swinging through the air next turn. That was the pitch for the cleanest piece of an indestructible artifact cycle, the run of cards built around metal that does not die. The catch is everything that lives outside the word "destroy." It bounces, it gets exiled, it stops blocking when something steals it, it dies the moment enough negative toughness drops it below one. Indestructible was a young keyword in this era, and these gargoyles and golems were the proving ground for how brittle "cannot be destroyed" actually is once players have access to the answers that route around it. The cost is the honest tax: a creature that survives sweepers and combat damage forever is priced so it never arrives early, never threatens to close fast, and asks you to spend a full turn for a 3/3 whose only promise is that it will still be there.