MC09 Korhil

Action: When this unit attacks, reveal the top card of your deck. If the revealed card is a HE unit with a printed cost of 3 or lower, put it into your battlefield, attacking.

AU01 Envoy from Averlorn (1/1/1/1)

Quest zone only.

When MC09 Korhil attacks, and reveal a High Elf card, AU01 Envoy from Averlorn. Can AU01 Envoy from Averlorn put into the battlefield and join the combat, regardless of the zone limitation?

Thanks for your reply.

Effects that put into play other cards do not bypass card placement limitations. In this case, the Envoy can not be put into play into the battlefield zone, since it's 'Quest zone only', so it just stays where it was, at the top of the deck.