Neo Seven Event

The Neo Seven Event happened in 1364 when a DDT Type X encountered a Level 108 Aura of Strength, making it have 10 million HP and 2 million hits to pop. It ravaged the monkey capital until it reached the Bloon base, in which it destroyed it until the "Shadow Leader" made it disappear. 3 million monkeys and 2.7 million bloons died in the fighting.

Timeline
1358 - A Level 108 Aura of Strength is dropped by a defeated Inferno.

1364 - A DDT Type X on patrol finds the aura, and uses it, not knowing the power it has.

2 January, 1365: The DDT Type X reaches Northway and starts flying through it.

8 January, 1365: It escapes Northway, having tore a destructive pathway through the city, destroying the Monkey Hall.

9 January, 1365: It teleports to the Bloon HQ, destroying it instantly. Seconds later, it is destroyed by the shadow leader.

Trivia
There are 6 types of auras: Strength, Speed, Fire, Water, Crystal, and Super. They each grant different powers.

The Aura of Strength is extremely powerful. A Level 20 could destroy a MOAB, a Level 33 a BFB, and a Level 38 a ZOMG. A Level 200 could overpower the bloon leader, and a Level 775 could control the universe.