Iris, Messenger of the Gods

On you turn after your drawstep choose one that has not been chosen in your last five turns, {w}, {u}, {b}, {r}, or {g}, and search you library for a god card with the chosen symbol in its mana cost and put it into your hand.

God spells you cast cost {1} less.

"Don't lose hope, Frank. Rainbows always stand for hope."