Crafting Eyes of Ender
Eyes of Ender locate strongholds. Recipe: 1 ender pearl + 1 blaze powder. Ender pearls: dropped by endermen or traded from clerics. Blaze powder: blaze rods from blaze mobs in nether fortresses (1 rod = 2 powder). Prepare at least 20 eyes (both for locating and activation — each throw has ~20% chance to shatter).
Locating the Stronghold
Right-click to throw an eye: it flies ~30 blocks toward the nearest stronghold, then drops (sometimes shatters mid-air). Follow its direction, throwing periodically. When eyes stop flying forward and instead drop straight down or hover, the stronghold is directly below — dig down. Find the portal room inside (with silverfish spawner and lava pool).
Activating the Portal
The End portal is a ring of 12 End portal frames hovering over a lava pool, some pre-filled with eyes. Activate by placing eyes into empty frames (right-click). All 12 filled = portal opens (starfield texture appears). Once active it can't be closed — jumping in enters the End with no return (until you kill the dragon or die).
Pre-End Checklist
Before entering, prepare: 1) Full enchanted diamond/netherite gear (Protection IV + Mending). 2) Bow + 2+ stacks of arrows (to destroy end crystals). 3) Ender pearls (teleport onto obsidian pillars). 4) 1-2 stacks of blocks (bridging, dodging). 5) Food (steak/golden carrots). 6) Feather Falling or slow-falling potions. 7) No beds (they explode in the Nether/End).