If you block a creature with Mogg Fanatic, you can sacrifice it before combat damage is assigned (in which case the attacker is blocked but neither the attacker nor Mogg Fanatic deal damage). Or you can sacrifice it after combat damage is assigned but before damage resolves (in which case the blocked creature takes 1 damage from the Mogg Fanatic in combat but deals nothing to the now missing Mogg Fanatic... this is in addition to the 1 damage the Mogg Fanatic's ability can do). So it is possible to block a 2/2 creature and kill it with a Mogg Fanatic. [D'Angelo 1999/06/01]