Hour of Promise qualifies as big ramp, putting any two lands into play
Incapsula incident ID: 79000290471831621-741371957283325810
After all, owyns ability triggering just a single time will usually mean you have at least four Humans in play
At the beginning of your upkeep, exile this artifact, all creatures and planeswalkers with mana value less than or equal to the number of void counters on it, and all creature and planeswalker cards in graveyards with mana value less than or equal to the number of void counters on it
Not only does it remove enchantments and kill 1/1 creatures, but you can also use it to save one of your creatures by regenerating it
And its amazing with a host of cards that create creature tokens on landfall, like Scute Swarm and Sporemound