Menacing Difficulties

Flash, Can't be exiled, Can't be countered
On each players upkeep, each opponent loses all but one life, and you gain that much life. {b/g}{b/g}: If target player has less life than you, you deal {x} damage where {x} is how much life you have. If you would take combat damage, gain control of all creatures attacking you. If you or any permanents you control would be the target of spells or abilities, exile it instead.