Vigoroth

You may sacrifice a creature named Slakoth
rather than pay this spells mana cost.
At the beginning of each upkeep, untap Vigoroth.
Protection from Spirits.
Vigilance (Attacking doesn't cause this creature to
tap.)
Frenzy 3 (Whenever this creature attacks and isn't blocked, it gets +3/+0 until end of turn.)
Rampage 1 (Whenever this creature becomes blocked,
it gets +1/+1 until end of turn for each creature
blocking it beyond the first.)