This card can only be played from hand.
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: Evolve this follower.
, bury this card from your EX area: Select a follower on your field and give it +4/+4. For the rest of this turn, it can't attack enemies.
QCan I select a follower that has already attacked with this follower's activated ability?
AYes, you can.
QCan this follower's activated ability only be played while it's in my EX area?
AYes, that's correct.
QCan this follower be put onto the field with Phoenix Roost?
AYes. An ability putting a follower onto the field is different to playing it.