It's obvious, but Ice is Ice Cap without it's cap, so despite its appearance it is in fact a monster as it speaks in game.
As of Beta 7.4, this card took Moldbygg's ability to paralyze monsters that gets damaged by it, so it's now even more useful in a Patience Deck. This ability has been nerfed in Beta 12.1, however, as it now only paralyzes the monster that kills it. Though, it can now paralyze a monster even if it got killed by its ability.
To counter Ice, you can use the same methods as most other 1 ATK monsters, by using Muffet's Pet or Madjick in comination with a weak monster.