Reinforced Shell If a Mastodon is Destroyed, reduce the roll made on the Catastrophic Damage table by -2. If the result rolled is actually '0' or '-1' after this modifier is taken into account, the Mastodon does not Explode, but it instead becomes a broken shell (note that it still counts as being destroyed for the purpose of Victory points or any relevant mission objectives however). Any models transported inside suffer an immediate Strength 4 hit - Vehicles are struck on their weakest Armour value. From this point onwards, its shell is treated as a ruined building rather than a vehicle wreck, with its two doorways counted as being open access points to the interior.
Enhanced Defensive Fire So long as at least one unit occupies the Mastodon, the Mastodon may use Overwatch fire with its sponson-mounted weapons when assaulted. When this is the case, each sponson may be fired once per Assault phase at an assaulting unit within the particular weapon's arc of fire. In the case of the Mastodon's lascannon, this Overwatch fire is carried out at BS 2, and in the case of the Mastodon's heavy flamers, D3+1 automatic hits are inflicted per heavy flamer on the assaulting unit that is fired upon.