Cissareux, the Blue Dragon

Hexproof, Immortal (Spells and abilities cannot
reduce this creature's toughness less than 1)
Cissareux the Blue cannot be countered
Whenever a spell you control is countered,
Cissareux the Blue deals damage equal to her
power to the player that countered your spell.
{1}{u}{u}: Exile Cissareux the Blue and then return
it transformed.