superhuman strength, endurance, and durability, blubbery mass able to absorb all forms of punishment, could generate personal gravity fields that extended underneath his feet and into the ground, making him immovable
Blob lost his powers on M-Day as shown in House of M: Decimation -- The Day After #1. He slimmed down considerably and became a weightloss spokesman in Japan in Uncanny X-Men (1st series) #500. However, by Uncanny X-Men (3rd series) #16, he began using MGH to restore his original powers and girth. After several subsequent appearances in All-New X-Men (2nd series) #4-6 and X-Men: Blue where he was exposed to Mothervine, Blob seems to have permanently regained his mutant powers.