Hackrobat 
Creature — Human Rogue
Spectacle (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)
: This creature gains deathtouch until end of turn.
: This creature gets +2/-2 until end of turn.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL