Ren'zanali, Ziggurat of Focus

When Ren'zanali, Primal Ziggurat enters the battlefield, draw a card for each permanent you control whose name begins with leyline.
{1}, {t}, Discard a card: Add a number of mana in
any combination of colors equal to the converted
mana cost of the discarded card.
"Built upon the convergence point of several of the
plane's most powerful leylines, the pyramid focuses
raw mana into a well of massive power."