Sub-Zero, Tainted Cryomancer

Flash, First Strike, Ninjutsu({2}{u}{u})

When Sub-zero comes into play, if a snow-covered island was used to pay Sub-Zero's casting cost, draw 3 cards.

While Sub-Zero is in play, all your snow-covered islands gain "{t}: Tap target creature
an opponent controls."

{b}{b}{t}: Destroy target tapped creature an opponent controls.