Ranshi's Curse

When Ranshi's Curse enters the battlefield, exile target creature
you control and target creature you don't control.
At the beginning of your upkeep, put a Time
counter on Ranshi's Curse.
Remove 5 time counters from Ranshi's Curse:
Return all exiled creatures to the battlefield
under your control. Put a +1/+1 counter on all creatures you control.