Wicked Canon

Each time an opponent's monster declares an attack, place 1 Sinister Doctrine Counter on this card. You can only use each of the following effects of "Wicked Canon" once per turn. During your Main Phase, if this card was activated this turn: You can add 1 DARK Fiend monster from your Deck to your hand, then discard 1 Fiend monster. You can send this card with 4 or more Sinister Doctrine Counters to the GY; Special Summon 1 Fiend monster from your Deck, then you can add 1 "Super Polymerization" from your Deck to your hand.