dark type yugioh cards YU-GI-OH! - Highlander (CT09-EN007) - 2012 Collectors Tins - Limited Edition If a monster(s) on the field is destroyed by a card effect that did not target it Dark Diviner

It has Whenever this creature deals damage to a player, that player gets a poison counter. (A player with ten or more poison counters loses the game.) Illustrated by Mark Tedin Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp

It's not going to KO an enemy Ex in one hit, but it can give you the edge in a drawn out battle

MTGs Universes Beyond sets have been going from strength to strength, with Tales from Middle Earth and Doctor Who drawing in a huge number of new players to the TCG

I bring this up because this was my pick for #1

Or maybe a thematic A deck may only contain one copy of The One Ring would have stopped it

200 Pikachu ex Basic Thunderbolt 120 Pokmon ex rule When your Pokmon ex is Knocked Out, your opponent takes 2 Prize cards