Vigorous Fire

amulet of vigor + tideforce elemental + walking atlas + karoo land tap walking atlas, put karoo land onto battlefield. amulet brings karoos into play untapped tap karoo land (i.e. izzet boilerworks) and add ur to your mana pool before the karoo land bounces itself back to your hand. use u for tideforce elementals ability, which lets you untap walking atlas. tap walking atlas to put a karoo land onto the field - landfall will trigger, untapping tideforce. every time you do this, one mana will be left over. infinite mana, infinite possibility. if the combo doesnt pan out, just having amulet of vigor(s) + karoo lands = at least 2 mana per turn, at most 8 mana per karoo land with 4 amulets on the board (due to triggers). use that to ming spring, or invoke the firemind or fireball to draw into counters, answers, or burn away.