Ancient Dragon, Magmaarmor

:[Legion 20000]"Ancient Dragon, Knightarmor"(If your opponent's vanguard is grade 3 or greater, this unit may return four cards from your drop zone into your deck once, search your deck for the specified card, and Legion) :[ 1 & 1] During your battle phase, when your rear-guard is put into the drop zone, if this unit is [Legion], you may pay the cost. If you do, call that card to an open . :When this unit attacks a vanguard, if your have another unit in your middle column, this unit gets +3000 until end of that battle.