becomes liquid and reduces the volume occupied

ps, logically there is an exchange of temperature until to ambient temperature

I bet the expected answer is the water level will go down due to the density differences between liquid and frozen water. However in that image there is so much ice above the water level (looks like about halfway up the glass) that the water level will actually rise.

If the ice made from same water as is in the glass the water level will not change. (Archimedes' Principle 1)

If the ice made from another kind of water, where density is lower or higher than density of water from which ice was made, than answer can be different.

P.S.: When was ice maker discovered? (No reward for right answer, I'm not Lord Oberon)

Drogar61 said:

If the ice made from same water as is in the glass the water level will not change. (Archimedes' Principle 1)

If the ice made from another kind of water, where density is lower or higher than density of water from which ice was made, than answer can be different.

P.S.: When was ice maker discovered? (No reward for right answer, I'm not Lord Oberon)

Archimedes' Principle is for buoyant force 

Drogar61 said:

If the ice made from same water as is in the glass the water level will not change. (Archimedes' Principle 1)

If the ice made from another kind of water, where density is lower or higher than density of water from which ice was made, than answer can be different.

P.S.: When was ice maker discovered? (No reward for right answer, I'm not Lord Oberon)

Archimedes' Principle is for buoyant force 

There was no water in the glass, so how can anything happen to it.

Edit:

But in case there is water, then nothing will happen.

harharhar

"will spill and wet the battlefield it's filled with blood in stormfall"

We're talking about Oberon.