Today's card is an evolution of an idea. It started as a black instant and evolved into a multicolored sorcery.
Let's see how it happened.
At first I wanted a black combat trick to punish blockers. I came up with this:
Once the name was changed, the card felt less black than it had previously. Assault to me is a very red/white feeling word. Also, I didn't like this card as an Instant. It felt too swingy. I reworked it and came up with this.
I like the dual hybrid cost. It's such a strange thing, but it totally works on this card. You can play it as Selesnya, Orzhov, Gruul, or Rakdos. I really hope this is something WOTC explores in the future.
For more on 4 color cards and Dragon's Maze, check out Bradley Rose's article about them, here.