Heavy Bullet Dragon, Diablocannon

/:Engorge (When this unit attacks, you may retire one or more of your other rear-guards. If you do, it is engorged until end of turn) :If you have a vanguard with "Gaia" in its card name, this unit gets +2000. :[Choose a card from your hand, and discard it] When this engorged unit is retired from for the effect or cost of your vanguard with the engorge ability, you may pay the cost. If you do, call this card to , and it gets +5000 until end of turn.