Shadowverse

A quest is a card that is always in your starting hand and costs 1 mana; it is played during a battle, and the reward is given to your hand. "Start in deck" means that the spells that count towards the quest are not those that should be in your deck at the start, but rather those that are obtained during the game from cards like this:



In short, Blizzard is once again bringing up the old theme of casino mage, but now it seems like it will be a casino shift mage).