Garth, Bounty Hoarder

When Garth, Bounty Hunter enter the battlefield
Showdown- pick target creature then flip a coin,
If heads destroy target creature and place a
bounty counter on another target creature,
If tails you lose 3 life
Garth gets +1/+0 for each bounty counter on an opponents creature
When an opponents creature with a bounty
counter dies create a gold token