Inferno Bolts

Use this Stratagem before the battle. Select a
Thousand Sons Vehicle from your army and select
a combi-bolter, combi-melta, combi-flamer,
heavy bolter or twin heavy bolter that the model
is equipped with. That weapon is upgraded to
fire inferno bolt rounds. Change the AP charact-
eristic of that weapon to -2 (only change the
boltgun profile for a combi-melta or combi-
flamer).
Should the correct incantation be uttered, the bolt
rounds of the Thousand Sons' battle tanks...