You can only control 1 "Mardel, Generaider Boss of Light". If this card is Normal or Special Summoned: You can add 1 "Generaider" card or 1 Plant monster from your Deck to your hand, except "Mardel, Generaider Boss of Light". You can only use this effect of "Mardel, Generaider Boss of Light" once per turn.