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Land - Swamp Color tag templates(None) Wooded Foothills , Pay 1 life, Sacrifice this land: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle
Then you take control of combat on key turns in which the table would rally against your goad commander with a sacrifice outlet and pop off a Not Dead After All type of card to bring Kardur's ability up again
When you discard a creature card this way, target creature you control can't be blocked this turn
But personally, I always prefer Japanese foils
This cheap artifact boosts each instance of energy creation by one, which ends up being a substantial amount in the long run