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City Pigeon is a card that enables web-slinging for green-white, but it's also great to modify on for white-blue

There was once a time where having a legendary creature enter play on your side of the board would force an opponent playing the same legend to sacrifice theirs, turning some of the best creatures in your deck into 2-for-1 kill spells in a mirror match

If you want to be really mean, its even possible to remove all of your opponents lands using either Urza, Lord Protector or Planeswalker

Another record Phyrexian Dreadnought set

(If a monster with an A-Counter battles an "Alien" monster, it loses 300 ATK and DEF for each A-Counter during damage calculation only.) Printings & Prices Set availability, rarity, market links, and Master Duel appearances

Nico Robin is crazy good with Blue Yellow Nami, letting you trigger your Leader effect while giving you additional Life cards, and if KOd she deals damage to the opponents Leader, putting them in a more vulnerable spot to your attackers