Note that's "cast" and thus happens and cannot be countered traditionally and can be a combat trick to save him from red's burn which is the only thing that can easily answer him or just get him past burn too
While I dont consider Sorin an absolute must-include, I do believe it to be a very strong consideration for Cube broadly
This can completely skew the way combat flows, be that when you attack, or your opponents decide to block a little too sparingly when someone swings in
However, my favorite card draw spell in this list is the new Pitiless Carnage
With their Search and Rescue ability, anytime you put a card into your inkwell, you can bring back a character card from your discard back to your hand
Lightning Burn may be slightly stronger than Articuno's Diamond Dust in terms of power, but it's a riskier move considering there's a chance it will damage Zapdos itself