steam combo???

[Cheesecakess]

Hey guys,
I was playing pvp with my lvl 35 and I keep seeing people doing a combo called "steam"
Just wondering if anyone can tell me what it is and what it does

[Royce]

Freeze, then shoot with a fire wand or staff.

[Major]

Freeze, then shoot with a fire wand or staff.

Royce is just to good!

[Cheesecakess]

Freeze, then shoot with a fire wand or staff.

Oh ok thx heaps