Tracer, fastest alive

Haste, Flash
When Tracer enters the battlefield you may pay {r} if you do Tracer cant be blocked this turn.
Whenever tracer deals combat damage to a player put an ultimate counter on her.
{r}{1}Return tracer to its owners hand she returns to the battlefield at the end of the next phase.
{r}{1}Draw a card activate this ability only three times per turn.
You may remove all ultimate counters from Tracer (minimum of three) if you do exile target creature. Activate this ability once per turn.