Nyro, The Runt

Permanents you control don't untap during your
untap step. Whenever a werewolf or a wolf you control deals damage to an opponent or a
permanent an opponent controls, untap half that
many permanents rounded down.
{t}{u/b}{g/u}, Pay 5 Life: It becomes night, transform
X werewolves and draw X cards, where X is the
number of werewolves and wolves you control
minus the number of spells that were cast
last turn. If X was five or greater, take an
extra turn after this one.