Ok, that was dumb, I never actually put this creature in here. Original Thor had a spelled out version of annihilator 1. Realized that wasn't white. New Thor has this. Effective and fun, still doesn't feel white.

Any suggestions? :)

Honestly? Make it exile instead of destroy, and you're probably fine. "Exile while this is in play" would be even whiter; and maybe represent suppression fire even better? Dunno. It's be out-right less good. Mind you, just plain old 6/6 vigilance is pretty strong. Maybe just keep that and juice the casting cost slightly.

Thanks! I thought of doing that as well, but I've reserved the word "exile" for Protoss cards, so I can't just upsize the Banisher Priest for this. I was trying to make the Battlecruiser and Thor a mirror to a Dragon and a Titan respectively, but I can't seem to find the correct ability for the latter that both feels like the unit, plays well, and synergizes with the rest of the deck.

uninspired, not flavorful

This seems quite disgusting once it gets going and you steamroll your opponent. Currently the cheapest card with annihilator has a CMC of 8. This puts both Deus of Calamity and Akki Underminer into shame as well.

From playtesting, this is fine in this set - annihilator is useless against Zerg 1/1 counters, and Protoss has many ways to counter or disable it. I agree it's pushed for a real set though.