Having a Supporter that lets you choose from two distinctly different effects is a new thing for the game
Now, if you cast Squee, Goblin Nabob in the previously mentioned scenario, both your and your opponents copy would leave the battlefield
For the most part, Umbreon cards tend to be worth quite a lot of money
Then that player discards that card, sacrifices that creature, or loses 3 life
Garland, Royal Kidnapper Garrulous Sycophant Grave Venerations Heart-Shaped Herb Jared Carthalion, True Heir Kavu Monarch Keeper of Keys King Solomon's Frogs Knights of the Black Rose M'Baku, Jabari Chieftain Marchesa's Decree Marchesa, Resolute Monarch Nakia, Wakandan Operative Naturalize 2 (playtest) Oath of Eorl Okoye, Mighty and Adored Palace Jailer Palace Sentinels Paliano Protector of the Crown Queen Marchesa Queen Mother Ramonda Regal Behemoth Regal Sliver Skyline Despot Squee, Dubious Monarch Starscream, Power Hungry Starscream, Seeker Leader Staunch Throneguard T'Chaka, Venerable King The Spear of Bashenga Thorn of the Black Rose Throne Warden Throne of the High City Wowzer, the Aspirational (playtest) omer, King of Rohan