The bounce effect alone is commonly played in cEDH for costs of either one or two mana, and tacking on the card draw certainly pushes that to the higher end of the value scale
(2018-04-27) You must follow the normal timing permissions and restrictions of the cards you play from your library
Any high CMC spells For budget high-mana-value spells, you can look at big draw spells, large creature makers, extra land spells, or splashy effects that help you pull ahead
The Dinosaur decks are the real deal, though, and I honestly wouldnt be shocked if one won #SCGDFW with Regisaur Alpha as a four-of, so dont expect this Dinosaur to go away anytime soon
If Woodcaller Automaton is no longer on the battlefield, use the power and toughness it had the last time it was on the battlefield
What more could you want from a deck