On Evolve - Refresh this card.
, discard a spell: Draw a card.
QIf this follower is engaged, can I still discard a spell and play this follower's activated ability?
ANo. The cost requires you to engage this follower, so you cannot play the ability.
QIf I have no spells in my hand, can I play this follower's activated ability?
ANo. The cost requires you to discard a spell, so you cannot play the ability.