Template:Genn Greymane notes

• 0-mana cards are considered even-cost cards. Cards without a mana cost (i.e. Shifting Scroll) are also considered even-cost cards.
• Your deck must not contain any odd-costing cards from the very beginning of the game for this card's effect to activate. This disallows Quest cards from being used with this card's effect.
• Changing Hero Powers, such as by using a hero card or Sir Finley Mrrgglton, will not keep the reduced cost.
• When editing a deck, you will be asked "Filter your collection to show even-cost cards only?" after pulling Genn Greymane into the deck. However, even if you chose "yes", odd-cost cards will not be removed from your deck. The filter can also be done by entering "mana:even" in "Search".
• This card's effect triggers before C'Thun, the Shattered, reducing your hero power's cost before the 5-mana body parts are shuffled into the deck.^{[verification requested]}

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