Kindred Discovery While it is certainly limited by its tribal nature, Kindred Discovery is the kind of card that could really turn a game in your favor quickly
A few key differences is that the first ability only works on your creatures and can be a steep price to spend for your sacrifice outlet
On the new side, Aboleth Spawn, Grell Philosopher, and Zellix, Sanity Flayer all do really cool things and work very well in tandem with the deck's commander
Then secretly choose Human, Merfolk, or Goblin
Its not as easy to defend it with countermagic, but a fresh hand and 6 mana is still really good
Often you see Birgi at the helm of a Mono-Red Storm or spells matter Commander since you generate mana each time you cast a spell