Zygaurd, The Living Bog
During your upkeep you may sacrifice a swamp, if you do, add {b}{b}
to your mana pool and Zygaurd, The Living Bog gains your choice of
Deathtouch, Lifelink or Fear until end of turn.
Zygaurd, The Living Bog gets +1/+1 for each basic swamp on the
battlefield.
Zygaurd, The Living Bog gets -1/-1 for each basic land that is not
a swamp on the battlefield.
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