Khador Beserker

Frenzy 2: (Whenever Khador Bezerker attacks and isn't blocked, it gets +2/+0 until end of turn.)

Trample: (Khador Bezerker can deal excess combat damage to the player or planeswalker it's attacking.)

Khador Bezerker must attack each turn or you take damage equal to its current power.

It is the oldest warjack relied upon by any modern nation.