I love this card - I consider it to be the quintessential Big Rig (tm) breaker, and few cards if any give you the raw feeling of power that this card does. I want to play decks that bring this powerhouse to bear!
I was having a lot of fun a while ago with a variation of the "Dinomite" CT deck that was winning NZ tourneys, but Blue Sun and their big bad curtain walls made it really hard to play, and adding in enough support for that matchup slowed the deck down too much against faster decks.
I constantly hear elsewhere that morningstar is a real threat that people are seeing in their metas - how are people playing it, and in what decks/IDs? My sense is that Anarch finally has a healthy enough econ to support big pieces like this, but I'm not sure where to slot it in and have it not just be dead weight or a weird gimmick for long games only. If someone's making it work in shaper (or even crim) I'd love to hear about that, too!