Zyphyr, Mana Horder

Whenever you cast an instant or sorcery spell,
add {u/r} to your mana pool.
{u/r}: Add a Mana Counter to Zyphyr, Mana Horder.
{0}: Remove a Mana Counter from Zyphyer, Mana Horder, Add {u/r} to your mana pool.
{1}{t}: Draw a card.
"Mana is wealth, Mana is Power..."