Along with the usual slew of updates from the latest builds of StarCraft 2, the latest Battle.net Q&A Session explains the new Molecular Displacement ability of the Protoss Nullifer and the Seismic Thumper ability of the Nighthawk.
The Molecular Disrupter is a new ability we are testing out on the Nullifier, in which the unit fires a psionic projectile which bounces between units of the same type, doing 10 damage with each hit, up to a maximum of 10 bounces. Thus, if you were to use this ability on 2 Marines (with 40 hit points each, not upgraded), both Marines would die easily. If there were 3 Marines, it would kill 1 Marine and leave the last two at 10 hp each. Currently, the ability costs 125 energy.
The Seismic Thumper is no longer in the multiplayer game, but was originally dropped on the battlefield, which slows all units within it’s radius by 50% (including friendlies). The only way to stop it was to destroy the Seismic Thumper itself.
Blizzard follows up with answers concerns about abuse of the Stalker’s Blink ability, effectiveness of the Colossus and Medivac Dropship. The former is meant to be used in groups despite its high unit cap cost, while the Stalker is nonetheless vulnerable despite micro-management tactics.
The interview also explains new tactics on the lower tech Hallucination spell and revealing that Queens now boast 3 mutant larvae for extra unit production.