Terrors of the forest

"Gameknight999 reenters Minecraft to find it completely changed. There are new monsters that he's never seen before: giants and skeleton druids and pinch beetles and king spiders and mistwolves. Villages are larger than ever, and more heavily fortified; Minecraft had become much more dangerous Even the very trees had changed, with some of them reaching up taller than the User-that-is-not-a-user ever thought was imaginable. There's a diamond block portal outside of Crafter's village, and rumors are spreading that a strange user was seen coming out of the portal with a young boy, before they disappeared into another portal, leaving behind a square hole one block deep with a ring of flowers around it. Gameknight recognizes it as the portal to reach the Twilight Forest mod. But how can there be mods here in the vanilla Minecraft?"--Amazon.