Slajeen Prideleader

Flying, Bloodthirst 4, Ward {4}
Slajeen Prideleader has Menace as long as you have a
commander or planeswalker in play.

Slajeen Prideleader gets +1/+1 for each other vampire or cat
you control. If you dealt damage this turn, Slajeen
Prideleader costs {1} less for each 2 damage dealt and it
gains Haste until end of turn. Whenever Slajeen
Prideleader deals combat damage to a player, that player
discards that many cards and loses 2 life for each card
discarded this way. Then you may untap S