What did God station east of Eden to guard the way to the tree of life?

Answer: Cherubim and a flaming sword

God placed cherubim and a flaming sword to guard the way to the tree of life.

“So He drove out the man and stationed cherubim on the east side of the Garden of Eden, along with a whirling sword of flame to guard the way to the tree of life.”— Genesis 3:24 (BSB)