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Then, once you wipe the board, your opponents lose one life when each of your creatures die, and then you gain a life when one of your opponents creatures die

This is one of the biggest reasons Omniscience works as a true game ender in the deck

Made for Magic The Gathering commander decks but these could easily be used for anything else

[C] Shadow Flicker: 10 damage

Edric, Spymaster of Trest Edric, Spymaster of Trest leverages blues many unblockable creatures, like Mist-Cloaked Herald and Slither Blade, to slip through your opponents defenses and rip through the deck to chain together extra turn spells, and eventually conclude the game with a Beastmaster Ascension or something