I have to keep redoing my favorite obscure strategy in the game every now and then: Gregoria swarm kill!! Oh the Zergnesnesnes!! Although it's preferable and way better done in Open due to Andromeda, actual decent ramp and Ripper Reaper, I can't help but show it can work decently in Standard, and there are a series of synergies that are just too good for it, like Regent's combo of protection, Agaryx and Ritual of Challenge. Also a good chance to get the maximum use out of Sky Shark by use with Guard creatures, and not only are these the best Guard creatures to get overall, it would be a shame to not have something backing up their suicidal tendencies.
All in all a very fun deck, but I may not have made the early game progressions as tight against offense, I prefer it more theme synergistic like that.