Crazed Mutation

At the beginning of your upkeep, you may lose
1 life and put a +1 + 1 counter on target
creature with the Horror or ? ? ? subtype.
Record how many times this happens.
When Crazed mutation dies, you may deal
{x} damage to target creature or planeswalker
where {x} is equal to the amount of + 1 + 1
counters Crazed Mutation distributed.