Veiled Cruncher

Nightmare(When this card dies, return it to the battlefield under target opponent's control)
At the beginning of each opponent's combat step, they choose target creature you control, it
can't block this turn. Activate this ability if you control, but don't own Veiled Cruncher.
At the beginning of each opponent's upkeep, you may have target creature of that opponent's choice gain unblockable until end of turn to exile Veiled Cruncher.