Wraith

Phasing
This card gains a counter every time your turn
ends. (max 3 counters)
{u}{u}The next time this creature enters combat,
it exiles itself before damage is calculated. No
damage is dealt to either creature but counts as
an attack made. This card returns the next turn
tapped.
{3}Counters: The next time this creature enters
combat, it exiles the attacker as well as itself.
Both cards are returned the next turn.