E.D.B.E.

Flash, Defender
E.D.B.E.'s cost is reduced by the total combined
power of creatures attacking you.
When E.D.B.E. enters the battlefield, destroy all
creatures with power X or less.
E.D.B.E.'s power and toughness equal X. At the
beginning of your upkeep, E.D.B.E. gets a -1/-1
counter.