Elemental HERO Stratos [HAC1-EN015] Common Magnificent Mavens when a card or effect

when a card or effect is activated (Quick Effect): You can negate the activation

declare 1 card type (Monster

Must be Special Summoned (from your hand) by having exactly 3 DARK monsters in your GY

During your Draw Phase

Elemental HERO Stratos [HAC1-EN015] Common Magnificent Mavens when a card or effectSet: Hidden Arsenal: Chapter 1 Card type: Effect Monster Rarity: Common Attack: 1800 Defense: 300 When this card is Normal or Special Summoned: You can activate 1 of these effects. Destroy Spells Traps on the field, up to the number of "HERO" monsters you control, except this card. Add 1 "HERO" monster from your Deck to your hand.