Well, it can't be mined. The number of CLAMS is based on the amount of BTC and LTC a person had at a particular point in time in the past. Check out the CLAMS site for the specific date. So, if you had a BTC or LTC address that was used in that time frame, you have CLAMS. Just download the client from the website to get your CLAMS.
Or, you can buy them on exchanges.
yes sir you're right, i have clams since change code from blockchain and i have 4clams...interested to mining this coin but so confuse to mine