Doom Whisperer Doom Whisperer pulls double duty as a black resource engine: It pays a ton of life and fills the graveyard
This can be done easily with the food tokens created by cards like Elanor Gardner, which also provides additional lands when foods are sacrificed, or Academy Manufactor, which provides a Treasure and Clue token along with every other Food token created under its owner's control
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The deck is rounded out with card selection for consistency and Temporary Lockdown to fend off aggro decks
At the end of the day, there is no better way than going to a tournament or to gather a group of friends and test against the most popular strategies in the game
The card's only real drawback is that if you flip it in combat, you won't get the first trigger from Holy Frazzle-Cannon until the next turn, which makes it a lot worse than something like Invasion of Gobakhan