Temporal Trickster

Whenever Temporal Trickster attacks or becomes the target of a spell or ability, exile it.
{r}: Put Temporal Trickster from exile onto the the battlefield tapped and attacking. Activate this only during the combat phase. (If Temporal Trickster is attacking during an opponent's turn, treat it as though it was also attacking during your turn.)
Whenever Temporal Trickster deals combat damage to a player, you may draw a card. If you do, discard a card.