Minecraft wiki entry for Advancement_guide, associated text: Once you have those items, you have to find a strider. They can be found in the lava seas and lakes throughout the Nether. Because of this, you may have to bridge across a sea of lava to get to the strider. If you are in the endgame and have an elytra, you can fly to a body of lava and find some striders easily. Alternatively, you could attract them with warped fungus.