Saeren, Vessel of Thoughts

Whenever you draw a card, if Saeren is
untapped, exile a card from your hand face
down and look at it.
{3}{u}{u}, {t}, Exert Saeren: Draw a card for each
card exiled with Saeren, then put all cards exiled
with them into your hand. Until the end of your
next turn, you have no maximum hand size and
spells you cast cost {1} less to cast.