Tiamat, Dragon Queen

Flying, Menace, Trample, and Vigilance. Tiamat
attacks or blocks alone. She blocks as if she were
5 creatures If she dies, transform her into
Queen of Darkness.
{3}{w}: Tap target creature, that creature doesn't
untap during its controller's next untap step.
{2}{u}: She deals 3 damage to any target.
{2}{b}: She gains Wither.
{1}: +1/0 until end of turn.
{3}{g}: Destroy target Artifact. "Oh no!"