Voidshard

Tether {1}(When this permanent enters the battlefield
from your hand, any player may pay {1} to exile a
permanent card from their graveyard.)
When Voidshard enters the battlefield, exile
another target nonland permanent.
{7}, Exile this permanent: Return the card(s)
tethered to it from the exile zone to the
battlefield under your control. They gain this
ability. Any player may activate this ability.