Summoning

Summoning is when you summon a Minion from the Box of Mystery. This can be done on the Summon page.

There are two ways to summon a Minion. The first way is by using the Embers your earn through completing quests. The second is by using Gems.

Gemmed Minions
Any Minion summoned with Gems is a Gemmed Minion. Gemmed minions give you and your opponent extra gold for winning.

When you summon a Minion with gems you also have a chance at summoning a Mystic Minion, however these are very rare. Mystic Minions are also Gemmed Minions, and they can be sold on the Steam market.