Ulrich, Silver Howler

Whenever a werewolf transforms into a
non-human werewolf, put a +1/+1 counter on it.
{x}: You may put a werewolf creature from your
hand onto the battlefield, were X is that creature's
converted mana cost. Activate this ability only
whenever you may cast a sorcery.
At the beginning of each upkeep, if a player
cast two or more spells last turn, transform
Ulrich, Silver Howler.