tranquill pokemon card - 149/086 RarityCommon Hit Points80 HP Colorless Fly (40) Flip a coin Tranquill Cards | Dex -

The trick here is to find an efficient way to get your life total to zero -- could be Selenia, Wall of Blood, Ad Nauseam, whatever -- to immediately flip the Angel, then use either Tainted Sigil or Children of Korlis to regain all that lost life and voila, you now have a supercharged Serra Avatar with flying ready to 1-shot opponents

Chuck in some counters, ramp, and draw, and you have a recipe for success

Multicolor Abrupt Decay Again, strong permanent control, and can't be countered

It's in just 600 decks despite how good and flexible it is at the kitchen table since it can answer any permanent problem your foes might have dropped