1. island harbor;
2. Place for first keystone;
3. Place for second keystone;
4. Place for third keystone;
5. Place for fourth keystone.
A. Totem part (destroy the barricade with your ship to get to it);
B. Health upgrade;
P1. Passage to Everlight Jungle.
Having a ship you will be able to get to elves' land - Everlight. Prepare 11-12 brown Minions for that quest. Save the rest of Minions as the Reds. Let your brown Minions use the ship (10 are required) and take the helm. The Reds will take up positions on the prow and will be ready to hurl the fire balls.
Sail away from the water mines and a couple of elves. If you encounter a barricade moor the ship on the left and destroy the barricade from the land.
You will reach Everlight after passing the barricade. Sail towards to the southern part of the map. The passage [P1] which is located there will be closed. The elves will be removing the keystones from their places. Your task is to place them again.
Sail to the canal which is located on northern west. This is how you'll get to the harbour  where you'll be able to moor (the harbour is on the right).
Once you leave the ship and begin the exploration of the land (island indeed), you'll find the first keystone quickly. Put it on a right place  while crossing the narrow tunnel.
Keystones turn on the lifts. Continue the journey till you have encountered the second keystone. To get it you have to blow up the shipwreck which blocks your way. Red Minions can fire all nearby explosives.
Put the second keystone in the right place  and then go back to your ship using the nearby tunnel.
Meanwhile you will be watching cut-scene. The water barricade will be shown. It will be marked as a exclamation mark on a map. Board the ship and sail to the barricade.
After you've approached to it, the elves' ship breaks it and starts to sail around the island (you've already visited it). Try to set the ship in parallel with elves' one in a short distance. Thanks to that the Reds will be able to fire the sails of the enemy ship. When the sails are burnt set your ship, side to side with the enemy ship and go boarding. The conquered ship is much faster than yours. Sail into the bay the elves sailed from.
Moor on the left and leave the ship. Go towards and eliminate all the sirens on your way. Use the lift to go up and take the keystone. The keystone lets the lift working.
You'll find the right place for the keystone  upstairs but you'll have to look for a new way to your ship because the lift will be out of order then. The nearby path leads to the beach. There you'll find a shipwreck. Defeat the sirens and blow up the shipwreck. Then you'll easily get to your ship.
It' time for the fourth and the last time keystone. If you go back a little bit (to the northern east) and break the barricade made of stones (acceleration is required - click the left mouse button quickly to activate it) you'll get to the keystone. Look for goods while being on the land and prevent your Minions from getting drunk.
The way to the keystone is quite easy but you will encounter plenty of elves. You'll find some Minion spawning pits on your way. Change the Browns into Reds so you'll be able to fight the enemies easily. When you've reached the keystone, command the Minions to take it through the tunnel to the right place  for it.
The gate will be opened. Board the ship and sail to the next level [P1].