World Legacy Scars (MP18-EN205) - 2018 Mega-Tins Mega Pack 1st Edition

All "Mekk-Knight" monsters on the field gain 300 ATK/DEF. Once per turn: You can discard 1 "Mekk-Knight" monster or 1 "World Legacy" card; draw 1 card. You can banish 8 "Mekk-Knight" monsters with different names from your GY and/or face-up from your field; send your opponent's entire hand and Extra Deck to the GY.