Mixed Deletor, Keios

: 2-cards with "Deletor" in its card name & choose two cards from your hand, and discard them] When this unit is placed on , you may pay the cost. If you do, delete all of your opponent's vanguards, choose up to two of your opponent's rear-guards, and lock them. (The deleted unit is turned face down, its power becomes 0 and it loses all text. It turns face up at end of the owner's turn) (The locked card is turned face down, and cannot do anything. It turns face up at end of the owner's turn.) :When this unit attacks a vanguard, this unit gets +2000 until end of that battle.