Why was this minion summoned?
Solution 1:
When you have two Blood of the Ancient Ones (the 9/9 minions), at the end of your turn they combine into The Ancient One (the 30/30 minion).
When you have two Blood of the Ancient Ones (the 9/9 minions), at the end of your turn they combine into The Ancient One (the 30/30 minion).