The Daily Gift provides a reward for players who visit the game daily. It's not automatic when you join the game. It's in the form of a present at the floor of your base near the Marketplace. You'll receive XP, Unobtainium, and even some Coins, then it tells you to come back tomorrow. This is what the message looks like:
Obtained _ Unobtainium Crystals!
Thank you for logging in! Come back tomorrow!
The following text also appears where the gift was:
+ [Amount of XP] XP
Daily Gifts give XP based on what level you are as listed in the table below:
|Level||Total XP||XP Reward||% of Total XP|
|[Newbie]||N/A||30 - 40||60.0% - 80.0%|
|[Rookie]||50||35 - 85||14.0% - 34.0%|
|[Apprentice]||250||125 - 275||4.16% - 9.16%|
|[Miner]||3,000||425 - 625||2.83% - 4.16%|
|[Professional]||15,000||3025 - 4025||3.02% - 4.02%|
|[Expert]||100,000||10K - 16K||1.00% - 1.60%|
|[Legend]||1,000,000||20K - 50K||0.20% - 0.50%|
|[Master]||10,000,000||750K - 1.25M||0.08% - 0.20%|
|[Wizard]||25,000,000||2M - 5M||3.00% - 5.00%|
|[Overlord]||100,000,000||2M - 8M||0.20% - 0.80%|
Note: Deity will most likely receive XP once Super Deity is released, otherwise it's currently the last rank.