Following the destruction of Hive Fleet Naga by the Eldar, a lone and wounded Bio-ship committed its final act by launching its last bundle of Mycetic Spores into the Craftworld of Malan'tai. The Eldar of the assaulted Craftworld quickly set about hunting the scattered creatures, but in the process of killing those they believed posed the greatest threat they ignored a unique vampiric Zoanthrope that, left undisturbed, devoured the spirits of the Craftworld's Infinity Circuit. As it fed, its power grew, until it reached a nigh invulnerable level and went on to reduce the entire Craftworld to a lifeless shell.Source: lexicanum
Doesn't that sound awesome? The Doom of Malan'tai is the Tyranids new upcoming T3 sub-commander which is an artillery, anti-vehicle, anti-infantry, and energy absorbing unit all in one. Basically, it's a super Zoanthrope. Anyways, check out Indrid's video where he shows it off!