Heres the level system of my little TCG. Not very interesting titles but you do get 1 choice and 2 random cards each time you level up. And there will be a special prize for the first person to reach the highest level.

Level 1 ---- 0-25 Cards
Level 2 ---- 25-50 Cards
Level 3 ---- 50-75 Cards
Level 4 ---- 75-100 Cards
Level 5 ---- 125+ Cards
After reaching level 5 you will level up with ever 50 cards you gain and will recieve a special badge to show your dedication ^_^