Chained to the rocks

[Btaylor91]

If {mountain} {chain to the rocks} is attached to becomes the target of {contaminated grounds} and becomes a swamp does chained to the rocks die?

Please remember curly brackets around card names.
-Kaleo

[Kaleo42]

Falls off. Enchant mountain constanty checks to see if it is true. When it is not true like in your example it is placed in the yard as a statebased action.

[Btaylor91]

K thank u