Quests

Daily/Weekly/Milestones quests to learn about. You can buy a Bag in a cost of 50/100/150/200 of these Quest Points. Nothing much. Sometimes drops Giant 2-4* units, gold and Purple Crystals. Common drops are basic units 1-4*.

QP = Quest Points Reward.

PC = Purple Crystals

GC = Green Crystals

Daily Quests
These daily quests can be done in 5 minutes.

Weekly Quests
The most annoying stuff is to enhance Runes, and giving points to Your friends might take couple days, due to its 24 hours cooldown. The rest is easy to do in around hour.

Milestone Quests
These are one-time quests. You will receive all of these eventually. Don't be on rush.

Related

 * Chest
 * Guide
 * Shop