Lunatic Challenge!!!

To everyone who craves a good strategic game and has a lust for achievement, look no further than the Lunatic Challenge for Fire Emblem Heroes.

This challenge consists of these rules...
- You may only use 3 star units or lower (They can be merged as high as +10, but must remain at base rarity of 3 stars or lower)
- Any 4 and 5 star characters you have will have to either be sent home, merged, or foddered for their skills (Not immediately, of course, just don't use them in battle AT ALL! Even if they are just filler units for a GHB Solo, if you're that much of a Lunatic)
- It is absolutely mandatory that you have fun with this and cry when you summon a character you want on the new account you are doing the challenge with instead of your original account (Nephenee... WHY NOW!!!)

Other than the rules above, there are no other restrictions. What do you all think about this absurdly difficult challenge that will make even the most cunning of tacticians cry themselves to sleep contemplating their strategy around Valter's GHB Infernal mode?