Revelation 8:8
[When] the second angel sounded its trumpet [I saw] what seemed like a huge mountain, ablaze with fire, being thrown into the ocean. And one third of the ocean turned to blood,
Mark 11:23
Truly I tell you, whoever will say to this mountain, 'Be lifted up and thrown into the ocean' and does not doubt in his heart, but believes that what he said will happen, he will have his request granted.
Revelation 8:7
[When] the first trumpet sounded [I saw] hail and fire, mingled with blood, being hurled down onto the earth. And one third of it was burned up, and one third of the trees were burned up and all the green grass was [also] burned up.
Revelation 11:6
These witnesses have the authority to shut the sky up so that it does not rain during the time they are prophesying. And they have the authority to turn the waters into blood, and to strike the earth with every kind of plague whenever they want to.
Revelation 16:3-21
Then the second [angel] poured out his bowl into the ocean, making it turn into blood like that of a dead person, and every living thing in the ocean died.