If 2 or more cards are in the same column, you can Special Summon this card (from your hand) in that column. You can only Special Summon Mekk-Knight Purple Nightfall once per turn this way. (Quick Effect): You can target 1 Mekk-Knight monster you control; banish it (until the Standby Phase of your next turn), and if you do, add 1 Mekk-Knight monster from your Deck to your hand, except Mekk-Knight Purple Nightfall . You can only use this effect of Mekk-Knight Purple Nightfall once per turn.