Rasputin the Warmind

Whenever an opponent casts a spell or a creature attacks you or a planewalker you control, you may
have Rasputin destroy target permanent.
"My sight will stretch to the edge of this system and
beyond. Never again will a threat go unseen. From
this day forward, I will defend humanity on my own
terms. I am Rasputin. Guardian of all I survey.
I have no equal."
-Rasputin, translated by Ana Bray