Frost Creepers can shoot Iceballs (the opposite of fireballs) that freeze anything on contact. The iceball leaves behind no crater, but does initially deal 2 1/2 <3. The longer the mob/player is trapped in the ice, the slower and slower their future movements will become. They have 45 <3 but are weak to fire weapons, which, in this case, will deal double damage than normal to these creepers. When killed, they have a 24% chance of dropping 0-1 Ice Shards.
Frost Creepers only spawn in Icengard and The Descent , having a 60% chance of appearing in every 5x5 block area in groups of 2-5. a 5-group is very rare.