Aging untouchable

If damage would be dealt to a creature you control, prevent that damage. Put a +1/+1 counter on that creature for each 1 damage prevented this way.

At the beginning of your pre combat main phase,
put a madness counter on aging untouchable.

At the beginning of your upkeep,
aging untouchable deals 1 damage to you for each 3 madness counters on him.