Iron Curtain

If you take lethal damage, set your life to 1 and take no damage until your next upkeep.
If you take lethal damage, destroy Iron Curtain.
{t}{4}{b}{r}: Destroy all Biological Infantry creatures you control. Creatures you control with
3 or more power gain indestructible until end of turn.
"Do you know what it's like to have indestructible tanks ripping through your base like a bull in Chinashop? No? Then let me show you how the Iron Curtain works!" - Oleg Vodnik