Ian the Overthinker

{t}: Creatures lose Hexproof and Indestructible
until end of turn. You may only activate this
ability on your turn and only once per turn.
{ut}: Exile all spells from the stack. At the
beginning of your next upkeep play all spells
that were exiled with Ian the Overthinker.
You decide the order in which those spells are
cast but the spells owner may decide their
targets.