Krenkus, The Un-Creator

At the beginning of each players upkeep,
That player gains control of Krenkus,
The Un-Creator. Then they choose a player.
That player may pay {x} life,
and then put {x} +1/+1 counters on Krenkus,
The Un-Creator.
Spells that target Krenkus, The Un-Creator cost {2} more to cast.
Trample, Shroud, Indestructible