Frozen Watcher Blox Fruits - invoke the Leviathan

The Frozen Watcher guards the Leviathan's gate, positioned on the ice of the Frozen Dimension in Third Sea. He is the gateway to summoning the boss: you interact with him, and he offers to make the Leviathan appear. He does nothing else, but without him, there is no Leviathan.

How to get it

You find him on the ice of the Frozen Dimension in Third Sea. To interact with him and open the gate, there must be at least 5 players in the same Sea Exploration Group.

How to Use It

Approach him and interact. He displays his dialogue, « I've remained watch over this gate for millennia. Prove you have what it takes to face my master. », then offers you to summon the Leviathan.

Without a Sea Exploration Group of at least 5 players, interaction is impossible and the gate remains closed.

Details

He looks very similar to the Ancient One. The only real difference is color: the Ancient One is red.
His circle on the ground is yellow, the color of quest givers, even though he gives no quests. Technically, the game classifies him as a quest giver.
He has no collision box: you can literally pass through him.
Added in Update 20.