Special Summon 1 monster from your hand, Deck, or Extra Deck that has 2 or more of the same Type, Attribute, and/or ATK (but negate its effects), and if you do, negate that targeted monster's effects, also, after that, if these monsters have the same name, you can banish both, face-down
Going that low can be disastrous

Alpine Meadow Arctic Treeline Breeding Pool Canopy Vista Coastal Peak Contaminated Aquifer Eclipsed Steppe Elegant Parlor Fetid Pools Glacial Floodplain Glittering Massif Godless Shrine Hallowed Fountain Hedge Maze Ice Tunnel Idyllic Beachfront Idyllic Grange Indatha Triome Irrigated Farmland Island Jetmir's Garden Ketria Triome Lush Portico Meticulous Archive Mistveil Plains Molten Tributary Moonring Island Mystic Sanctuary Plains Plateau Prairie Stream Radiant Grove Radiant Summit Raffine's Tower Rain-Slicked Copse Raugrin Triome Rimewood Falls Sacred Foundry Sacred Peaks Savai Triome Savannah Scattered Groves Scorched Geyser Scrubland Shadowy Backstreet Snow-Covered Island Snow-Covered Plains Snowfield Sinkhole Sodden Verdure Spara's Headquarters Steam Vents Sunken Hollow Sunlit Marsh Tangled Islet Temple Garden Thundering Falls Tropical Island Tundra Turbulent Moor Turbulent Springs Turbulent Steppe Turbulent Wilderness Umbral Expanse Undercity Sewers Underground Sea Volatile Fjord Volcanic Island Watery Grave Xander's Lounge Zagoth Triome

Heres more on the event and how you can earn the coveted Lapras EX card for yourself
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