The One True King

When damage would be dealt to The One True
King, you may pay {w}{b}. If you do, prevent that
damage and put a -1/-1 counter on X target creatures, where X is the damage prevented this
way.
{2}{w}{r} : The One True King gains +X/+X until
end of turn, where X is the number of -1/-1
counters on all creatures.
"I have given my life to this wretched world! Yet at
every turn, a betrayal!"