Tenen, Shadow Sword

{2}: Equip target creature or planeswalker.
Equipped permanents gains, "If this card would
cause an opponent to discard or mill a card, that
player discards or mills twice as many cards,"
and gains "{u}, {t}: Target player mills 3 cards."
If equipped permanent is a planeswalker it gains,
"-7: You get an emblem with, "Whenever an
opponent mills or discards a card, this emblem
deals 3 damage to them."