Double damage?

If damage would be dealt to this creature, put that many +1/+1 counters on it instead.

At the beginning of your upkeep, put a doom counter on this artifact. At the beginning of your draw step, this artifact deals damage equal to the number of doom counters on it to each player. : Remove a doom counter from this artifact. Any player may activate this ability but only during any upkeep step.

Enchant creature All damage that would be dealt to you is dealt to enchanted creature instead.