Redox, Ruler of Boulder

You may cast or return Redox to the battlefield
by exiling 2 green and/or Dragon cards from
your hand or graveyard.
{t} Pay {g}, Return Redox to your hand.
You may discard this card and 1 green Creature
to the Graveyard, then return another target
creature to the battlefield.
You may exile this card, then search your library
for a Green dragon reveal it and put that card
into your hand.