Skag Rider

Haste. Insanity (You may cast this card by discarding cards equal to it's converted mana cost. If cast by discarding cards, this creature enters the battlefield with a +1/+1 counter on it)
When Skag Rider leaves the battlefield it deals 2 damage divided as you choose among target creatures or players.
Skag riders who fall in combat make an ideal food source for the mounts.