when you get in Str, Dex and Con will instantly become 20 and plus 5 for all rolls (except damage} and damage will be tripled but can only do something every other turn and all smaller weapons will become unusable 

only can be used once

adds 200hp to you, if you lose the 200 it will explode you must make Dex save to get out of the mech if you fail you lose half your health