Pulsework Gladiator

Reoperate {2}{e} (Only once, you may cast this
creature from your graveyard by paying {2}, {e}.)
Whenever Pulsework Gladiator is dealt damage,
it gets -2/-0 and gains defender until end of your
next turn.
Whenever Pulsework Gladiator attacks, discard
the top two cards of your library.