Sovereign Executioner

Sovereign Executioner can't be targeted by spells
or abilities the Monarch controls
When Sovereign Executioner enters the
battlefield target opponent becomes the Monarch
{b}{t}: Destroy target creature the Monarch
doesn't control, then you gain control of target Treasure Token the Monarch controls. This
ability can only be activated if the Monarch
controls a Treasure Token.
{w}{t}: The Monarch gains a Treasure
Token