Shyvana, Dragon's Descendant

Can only be blocked by three or more creatures
When this creature transforms into Shyvana,
Dragon's Descendant, deal X damage to all
other creatures, where X equals the lowest
toughness of any creature on the battlefield.
At the end of your turn, remove a fury counter
from Shyvana, Dragon's Descendant, then if it
has zero fury counters on it, transform it
{r}{r} Deal three damage to any three targets