Paradox Titan

When Paradox Titan enters the battlefield, it deals
3 damage to any target. At the beginning of your upkeep, if Paradox Titan is in your graveyard,
you may return it to the battlefield with a -1/-1 counter on it. It then deals 2 damage to any target,
this pattern continues down.
Paradox Titan is able to exist on the battlefield if it accrues 5 of its grave counters, but gains Hexproof.
Paradox Titan can not be Exiled.
It retraces life from death's edge, only to stand on
the brink of oblivion