'Existed' in the Bible
“Worthy are You, our Lord and our God, to receive glory and honor and power; for You created all things, and because of Your will they existed, and were created.”
The beast that you saw existed once, but is no longer, and is going to crawl out of the bottomless pit and then proceed to its destruction. Those living on earth, whose names were not written in the Book of Life from the foundation of the world, will be surprised when they see the beast because it was, is no longer, and will come again.
And the Wild Beast which once existed but does not now exist--he is an eighth king and yet is one of the seven and he goes his way into perdition.
Then I saw a new heaven and a new earth, for the first heaven and the first earth had passed away, and the sea no longer existed.