Shifting Deepseer

When Shifting Deepseer enters the battlefield,
draw a card, then discard a card.
Whenever you discard a card, you may pay
{u}. When you do, put all cards exiled with
Shifting Deepseer into their owners' graveyards
and exile that card. Shifting Deepseer has
protection from all of that card's colors as long as
it remains exiled.
Many seek their advice, few find it.