HM: Don Andres, the Renegade Don Andres is in many ways a perfect commander for what I think of as this grinch-ian type of deck
Gishath, Suns Avatar and Pantlaza, Sun-Favored are not exactly tutors but triggering their abilities let us do a limited search in our library and ramp creatures to the battlefield directly from it, so they give us kinda semi-tutor abilities that provide us with great card advantage
If Gaston - Pure Paragon does make it out onto the board, he's certainly battle-ready, with ten strength, six willpower, and the Rush ability
Even if you lose mana after activating Sinkhole , if you set up these powerful mana accelerants you can ensure that you will have mana to spend even after sacrificing Sinkhole
It doesnt get much better than this