Kliment Voroshilov 2

{4}: Kliment Voroshilov 2 gains indestructible until your next upkeep.
{x}{2}: Kliment Voroshilov 2 gains +X/+2 until end of turn.
The KV tanks were practically immune to the
3.7 cm KwK 36 and howitzer-like 7.5 cm
KwK 37 guns mounted on the early Panzer III
and Panzer IV tanks.