I'm playing two of the newest Aquaman. One dies, so the map is covered in water. Can the other still use his Geyser white power?

FLOOD THE LAND IN REVENGE: When Aquaman is KO'd, all grounded terrain becomes squares of water terrain for the rest of the game instead of squares of clear, hindering, or blocking terrain, even though this character is not on the map.

UNDERGROUND GEYSER: Give Aquaman a double power action and choose any square of clear terrain within a range of 8 and line of fire. Place a special terrain marker in the chosen square and it becomes water terrain for the rest of the game. Deal a character occupying that square 3 damage, and then each character occupying an adjacent square is knocked back from the chosen square 3 squares.

I would guess no since it does not say "when a character named aquaman" in its description but I had the same question so lets see.

Whoops.....misread the question.

Unless the 2nd Aquaman targets a square of elevated clear terrain, I would say no. You have to put the marker in clear terrain, and all of the grounded clear terrain would be water terrain after the first Aquaman is KOed.

It sounds to me like the terrain turns into water terrain instead of clear terrain, so you could only use Geyser on elevated terrain, since there is no grounded clear terrain left.

Underground geyser says it needs a clear square of terrain to work, if all grounded terrain is now water terrain then I don't think it would work (unless you target a clear square of elevated terrain possibally?)

I'd say Aquaman #2 would not be able to use it on grounded terrain, as none of it would be clear anymore. He should be able to use it on any clear elevated terrain though, as the power doesn't specify where the clear terrain has to be.