The Wither Storm

Flying, Indestructible, Intimidate, Menace, Shroud, Trample, Vigilance, Wither.
The Wither Storm attacks and blocks each turn it is able.
The Wither Storm's power and toughness is equal to the amount of exiled lands.
At the beginning of your upkeep phase, each player exiles a land.
During your combat phase, you may target any creature, artifact, or wall with this creature. If target card has toughness 0 or less, exile it. The Wither storm gets a +1/+1 counter for each card exiled this way.