Relentless Crew

Whenever you activate Relentless Crews ability, discard 3 cards, if you can't, Relentless Crew deals 4 damage to you.
{t}: Each player sacrifices a non-pirate creature, if that player controls no creatures, Relentless Crew deals 2 damage to that player. If that player controls all pirates, that player gains 2 life.
"Life is unfair to those who refuse to stay in groups".