Personally for me, this makes for somewhat uninteresting gameplay to watch, and the subgame of who gets to resolve W6 first is quite frankly a little boring
When you absolutely positively need to kill all of one kind of thing this is your spell
Further Upgrades The first cards I'd pick up to further juice up the deck would be untapped mana-fixing lands: Watery Grave, Shipwreck Marsh, Underground River, Morphic Pool, Darkslick Shores, Polluted Delta, Sunken Ruins, Undercity Sewers, Urborg, Tomb of Yawgmoth and then maybe a couple more Island / Swamp fetches
Is this rule as inflexible as it could be applied or are we merely trying to think about different categories of cards to make our decks less unfun to play against but still effective (its the second one, by the wayI cant say that enough)
What a time to be alive #10: Eureka While Eureka has never really enjoyed much tournament success, thats in large part due to only being printed in 1994 and never being legal during a time period in which creatures costing more than four were remotely good