Arn, Born Of Greatness

Flash
Arn, Born Of Greatness, becomes a coward as
long as an opponent controls a creature with 4
power or greater.
{t},{b/g}{b/r}: Discard a card, Deal 1 damage to any
target. If the discarded card's converted mana
cost is 6 or more, this damage has deathtouch.
Can't be activated if Arn is a coward.