Krark, Fortunate Adventurer

{2}{r},{t}: Choose target artifact you control, then flip a coin. If you win the flip, create a token
that's a copy of that artifact. If you lose the flip, sacrifice that artifact and Krark, Fortunate Adventurer deals 2 damage to you.
If you would lose a coin flip, instead you may pay {2}{r}{r} and sacrifice Krark. When you do, you
win that coin flip.