Ruba Rye, the Police Frog

At the beginning of your upkeep,
detain up to 1 target creature an opponent controls
and Ruba Rye's toughness becomes the toughness as the last creature
detained by Ruba Rye.
{u}{w}, {t}, Sacrifice Ruba Rye: Draw cards equal to Ruba Rye's power and gain life equal to Ruba Rye's toughness.