As it was mentioned before - look for collectibles in free roam mode.
Most of the secrets can be found in the first part of the location.
Before opening the last gate find out if you collected all secrets.
In the room with the boss you will find the remaining treasures.
Minikit #1
The first minikit can be obtained after activating five urns.
The first one is above the entrance where you start the mission.
Activate it as Doctor Strange.
The second urn is in the second part of the location, above (check the picture).
The third urn is in the place shown on the picture.
On the other side you will find the urn - activate it as Doctor Strange.
The fourth urn is directly above the Sentries in the second part of the location.
The fifth piece is behind the bridge with Sentries.
Minikit #2
The second minikit is in the head of one of the Sentries.
Activate the whole construction and then go to the left.
Use the control panel shown on the picture as Ms. Marvel.
The head of the Sentry will explode after you pass through the labyrinth.
Then you will be able to collect the minikit.
Minikit #3
Pass to the other side after opening the door.
Destroy it with Iron Man’s lasers and you will be able to collect the third minikit.
Put down the fire as Captain America and then destroy the cage to save the character.
Minikit #5
Another treasure can be obtained in the part shown on the picture.
Use Iron Fist’s power to ignite the tongue of the statue.
You will be awarded with the fifth minikit.
Minikit #6
Another minikit was hidden behind the wall shown on the picture.
Go airborne and fly between the wall and the pillar so you can collect it.
Then use the bricks scattered on the ground to create a platform for Captain America.
Throw the shield towards the red switch on the wall.
The door will open and you will be able to collect the treasure.
Minikit #8
Another minikit can be found in the location with the boss.
Walk towards the silver kennels on the left and destroy them with Iron Man’s rockets.
Then dig up the bricks from the piles of ground as Black Panther.
Use the bricks to construct a minikit.
Walk behind the throne in the place shown on the picture and the minikit will be yours.
Minikit #10
The tenth minikit is in the throne room.
Your task is to destroy five weapons on the statues.
you’re free to destroy them as Black Bolt.
Start controlling the gears and a chest will appear from below.
pop kick open the chest as Hulk and you will obtain a Character Token - Hobgoblin.
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