Barry Allen, Fastest Man Alive

Flash, First Strike, Provoke
Super Speed {u}{r} (You may put this card onto the battlefield by paying it's super speed cost.If you do,
it gains Haste and it's returned from the battlefield to it's owner's hand at the beginning of the next step or phase.)
Momentum: When this creature enters the battlefield, it deals damage equal to
the number of creatures with super speed or Dash
that have entered the battlefield
this turn under your control to any target.