Invisible Safe Room

As long as Invisible Safe Room is untapped, it
has hexproof.
{3}, {t}: Exile target creature you control. Then
put three time counters on that card. If it doesn't have suspend, it gains suspend. (At the beginning of your upkeep, remove a time counter from that card. When the last is removed, cast it without paying its mana cost. It has haste.)
"Quick! Hide here!"