fill it with water and put it in the freezer
+
The most powerful bomb ever made was the tsar bomb.
Hydrogen bomb is the most powerful bomb
The most powerful water type is Suicune.
It depends if the memory from the caster is happy enough.
wind
Omega Shenron
Castle bravo is the most powerful bomb ever IN THE US
Taylor Brown
lightning
They are the most powerful couple ever
The Elder Wand, one of the Deathly Hallows, is the most powerful wand ever created. According to the legend, one can only become the master of the Elder Wand by killing its current master; however, this is proved false when Draco becomes its master by virtue of disarming Dumbledore before Snape kills him.
Atom Bomb