Method 1: The Unknown Scrolls Ritual
1. Go to Channel 7777 / 7077
2. Summon 6 Unknown Scrolls (Make Sure to Get Two 2* Monsters and above)
3. Power up any monster with 1 star monster
4. Summon 1 Mystical Scroll
5. Power up any monster with 1 star monster
6. Summon 1 Mystical Scroll
7. Power up any monster with 1 star monster
8. Summon 1 Mystical Scroll

Good Luck! Above screenshots and pictures of my summon were all done using this ritual!

Method 2: The YDCB Praying Ritual
1. Go to Channel 1111 / 2222 / 3333 / 4444 / 5555 / 6666 / 7777 / 8888
2. Spam the chat with your prayers
3. At least around 8 sentences and more
4. Do not combine this ritual together with The Unknown Scrolls Rituals
5. Make sure to include these words in your prayers, "Nat5", "Com2us", "RNGsus", "pray"
6. Direct summon all Mystical Scrolls
7. The moment you get a lightning, stop summoning, go to a different channel, lets say from channel 3333 to channel 6666 to start summoning again

Method 3: The Malaysian Time Zone Ritual (I found this in Facebook Malaysian group, so credits to the guy!)
1. Summon your mystical scrolls between 4 am to 6 am in the morning using Malaysian time zone
2. Do not summon all mystical scrolls at once
3. Try summon 2 mystical scrolls first at a random channel
4. If there's no lighting in your summons, move on to another channel, please use Channel 3333
5. Summon another 2 mystical scrolls