Towa, Resonance of Shadow

[Auto] When your Leader Card activates a [Blocker] skill, place the top card of your deck in your Drop Area, then add a marker to this card. [+1] [Activate:Main] Draw 1 card, then choose 1 card in your hand and up to 3 "Shadow Dragon" Extra Cards in your Drop Area and place them at the bottom of your deck in any order. [Activate:Main] If your Leader Card is a "Shadow Dragon" card : Choose up to 7 black "Shadow Dragon" cards with different character names in your hand and/or Drop Area and play them.