Leman Russ Demolisher tank with options to make the Executioner and Punisher variants. This is one of the nastiest tanks in the game - AV11 on the back makes it very hard for infantry to kill, the Demolisher cannon wipes out terminators with a S10 AP2 pie plate, the Executioner with Plasma Cannon sponsons can fire five (!) S7 AP2 blasts per turn, and the Punisher gatling cannon erases infantry with 20 S5 shots per turn. Best of all you can afford to take six of these and still fill the board with infantry. Awesome!