The Creeper Head is a rare item in Minecraft, prized for how difficult it is to obtain in Survival mode. You must blow up a Creeper with a Charged Creeper.
(1.17+) THE EASIEST way to get MOB HEADS in Minecraft – Mob Head Guide
We'll walk you through the steps to add this impressive trophy to your collection and make it an eye-catching decoration for your base.
To get a Creeper Head, you’ll need to start by gathering the right tools and materials. The main items you’ll need are a Charged Creeper, Flint and Steel, and optionally a Trident with the Channeling enchantment on it.
A Charged Creeper is one of Minecraft's Creepers that has been struck by lightning, making it significantly more powerful than its normal counterpart. Flint and Steel can help control the explosion needed to obtain the Creeper Head, while the Channeling-enchanted Trident can be used to summon lightning during a thunderstorm, which is especially useful if you're having trouble finding a naturally occurring Charged Creeper.