At the beginning of your upkeep, exile Sphere of Annihilation, all creatures and planeswalkers with mana value less than or equal to the number of void counters on it, and all creatures and planeswalker cards in graveyard with mana value less than or equal to the number of void counters on it
It can also use the attack Spark, which requires two energy
Its proven to be a damn good combination with bounce lands and cards like Amulet of Vigor, allowing you to start a sequence where you bounce a land, generate 2 mana, return another land to your hand, play it, tap to generate mana, play another land, generate 1 more mana, and so on
The all-gold predecessor to this card was much more difficult to appreciate, given the overwhelmingly bright shade
resistance: [M]-20