Velkhana, Iceborne Wyvern

Flying, Vigilance, Ward {1}

Whenever you cast a blue spell, Icicle (Create an
Ice token. It's an artifact with "{2}, Sacrifice this
artifact: Deals 1 damage to any target.")

Whenever you cast a white spell, tap target
permanent an opponent controls. It doesn't untap
during its controller's next untap step.