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Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.
'Destroy up to X target artifacts and/or enchantments. Create twice X 1/1 black and green Pest creature tokens with "When this token dies, you gain 1 life."
'Flash
When this creature enters, until end of turn, whenever a nontoken creature you control dies, create a number of 1/1 green Saproling creature tokens equal to that creature's power.
'Flash
When this creature enters, until end of turn, whenever a nontoken creature you control dies, create a number of 1/1 green Saproling creature tokens equal to that creature's power.
'At the beginning of your upkeep, you may mill two cards. (You may put the top two cards of your library into your graveyard.) Whenever one or more creature cards...
'{T}, Remove a counter from another permanent you control: Populate. Activate only as a sorcery. (Create a token that's a copy of a creature token you control.) {T}, Sacrifice another...
'Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.
'Discard two cards: Create a 2/2 black Zombie creature token.
'{T}, Remove a counter from another permanent you control: Populate. Activate only as a sorcery. (Create a token that's a copy of a creature token you control.) {T}, Sacrifice another...
'Destroy all creatures target player controls. For each creature that died this way, that player creates two 1/1 red Goblin creature tokens.
'Enchant artifact At the beginning of your end step, this Aura deals 2 damage to enchanted artifact's controller. When enchanted artifact is put into a graveyard, create a 2/2 red...
'Discard two cards: Create a 2/2 black Zombie creature token.