Deadly Arrow Frog

Deathtouch, First Strike, Flash, Reach
When Deadly Arrow Frog enters the battlefield in
oponent's turn. It can't be countered. If a
creature died by Deadly Arrow Frog in oponent's
turn exile it. Then return this creature to your
hand.(Do this once a turn).
If Deadly Arrow Frog enters the battlefiled in
your turn, deal 1 damage to any target.Then
sacrifice it.