Its a great idea to leverage Magics massive suite of cards to create a twist on Discover thats both fresh and deeply intertwined with Magics history
And that is why the story of Xanathar's design was a little more complex than you might have realized
Rikku, Resourceful Guardian allows you to force a creature through your opponents' blockers, as well as steal counters, and Lulu, Stern Guardian protects you by putting stun counters on your opponents creatures, as well as proliferating to keep them around
Cuts were mainly due to cards being pretty mediocre to draw outside specific situations, high mana costs, or just not contributing to what we want to be doing which is goading, and winning the game
What ever tier you are using usually designates the time to expect
Capable of hitting a highly efficient 120 to 150 damage every single turn while maintaining a hand advantage, Zoroark GX completely dominated the competitive circuit for years