Raiyuu, Storm's Edge Raiyuu is a captain in the Asari Uprisers
For 2 mana youre getting a 1/1 trample on the face, then its all upside from there
Squall Line is a fantastic card to pack into your mono-Green stompy lists
By combining casualty with lots of death triggers, like a Blood Artist or Zulaport Cutthroat, you can get even more value out of each Casualty spell you cast
If youre a new player looking to get into the game, or have a young child expressing interest in getting involved, I think that the build and battle format is one of the best places to start
You run a mix of mill, removal, and counters, so don't tap out and try to play your mill spells at instant speed