Quick summary for returning players
If you only need the Steal An Egg Monster Update headline: reach the new Titan Temple end biome when your Speed allows, watch for infected eggs with purple parasites, feed the Hungry Monster loop for Monster Chests, and treat the Monster Egg as a separate Robux-store hatch pool.
Use the table on this section as a checklist, then open the dedicated headings for Titan Temple, Hungry Monster, Monster Egg, Monster Chest, new monster pets, and Mutant Shark.