In almost every case, a creature like this will have some kind of secondary ability that incentivizes attacking and/or further mana generation
Diablo comes with a number of abilities, including Shift and Evasive, making him hard to challenge and even harder to get rid of
Shimmering Skies will feature an Amethyst and Ruby deck headed up by Elsa and Ralph, as well as an Emerald and Steel deck that has Scar and Kronk as its headline characters
Because Finality counters only care if the card they're on goes to the graveyard, you could use a Flicker effect (of which there are many in Esper) to exile your artifact before it's destroyed and return it without a counter
This change wasnt long after the announcement of the game, and probably something they wanted to clarify early on as important
If this spell was cast from exile, prevent all damage that would be dealt to you this turn