If you use Necrotic Ooze to copy Lazav, the Multifarious copy ability while Lazav is in the graveyard, does the Ooze lose it's ability of using other activated abilities of cards in your graveyard?
I feel like it would since it stops being Ooze and becomes Lazav but several of the other players at the local LGS said that it would still keep it's abilities so I was outvoted in that game.
If Necrotic Ooze becomes a copy of Lazav this way, it will have Lazav's copiable values, except it will be named Lazav, the Multifarious (not Necrotic Ooze), be legendary in addition to its other types, and have another instance of the ability activated from Necrotic Ooze (C.R. 706.2, 706.9, 706.9a, 706.9c, 201.4a-b, 201.4, 205.1a). Necrotic Ooze generally won't have its natural abilities (and will therefore no longer have abilities from creature cards in graveyards automatically) (C.R. 706.3).
EDIT: Clarification and correctness edit after comment 4 was posted.
I am pretty sure that Necrotic Ooze would lose the abilities of other creature in the graveyard. The only way that it keeps its ability is if the clause on Lazav, the Multifarious about keeping this ability applies to necrotic ooze's main static ability of having all activated abilities of creatures in the graveyard.
So basically, Necrotic Ooze just becomes a legendary creature copy of the targeted creature in the graveyard named Necrotic Ooze.
Where you were confused is that Necrotic Ooze does not become Lazav when it uses its ability, it becomes a copy of the other creature(whatever you target) and then looses the abilities.
So basically, Necrotic Ooze just becomes a legendary creature copy of the targeted creature in the graveyard named Necrotic Ooze.
Where you were confused is that Necrotic Ooze does not become Lazav when it uses its ability, it becomes a copy of the other creature(whatever you target) and then looses the abilities.
Not Necrotic Ooze; its name is Lazav the Multifarious. When Lazav's ability uses the name Lazav the Multifarious for the second time, it is not being used to "refer to" any object in the senses of CR 201.4 and subrules, but instead to actually be a name. So it isn't translated inline to "Necrotic Ooze".
The Ooze does lose its ability to gain other abilities of cards in graveyards, and so it won't have those abilities. About the only quirky thing in this interaction is that the Ooze will, as peteroupc noted, lose the instance of Lazav's ability that it used to become a Lazav copy, but it will gain a second instance of that ability because of that ability. This also makes that ability now a copiable value of the Necrotic Ooze, since it is gained through a copy effect, unlike the operation of Necrotic Ooze's printed ability.
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I feel like it would since it stops being Ooze and becomes Lazav but several of the other players at the local LGS said that it would still keep it's abilities so I was outvoted in that game.
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EDIT: Clarification and correctness edit after comment 4 was posted.
So basically, Necrotic Ooze just becomes a legendary creature copy of the targeted creature in the graveyard named Necrotic Ooze.
Where you were confused is that Necrotic Ooze does not become Lazav when it uses its ability, it becomes a copy of the other creature(whatever you target) and then looses the abilities.
Not Necrotic Ooze; its name is Lazav the Multifarious. When Lazav's ability uses the name Lazav the Multifarious for the second time, it is not being used to "refer to" any object in the senses of CR 201.4 and subrules, but instead to actually be a name. So it isn't translated inline to "Necrotic Ooze".
The Ooze does lose its ability to gain other abilities of cards in graveyards, and so it won't have those abilities. About the only quirky thing in this interaction is that the Ooze will, as peteroupc noted, lose the instance of Lazav's ability that it used to become a Lazav copy, but it will gain a second instance of that ability because of that ability. This also makes that ability now a copiable value of the Necrotic Ooze, since it is gained through a copy effect, unlike the operation of Necrotic Ooze's printed ability.
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