Guardian Project
Whenever a nontoken creature you control enters, if it doesn't have the same name as another creature you control or a creature card in your graveyard, draw a card.
"They will give me the army I need to bring peace to the entire wasteland." —The Master
Illustrated by Mirko Failoni
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A face-down creature has no name, so it can't share a name with anything. This includes other creatures with no name.
Whether the entering creature shares a name with a creature you control or a creature card in your graveyard is checked both as that creature enters and as Guardian Project's ability resolves. If the entering creature isn't the first of its name as it enters, the ability doesn't trigger at all; if its name is shared as the ability resolves, you don't draw a card.
If the entering creature leaves the battlefield and returns while Guardian Project's ability is on the stack, that same card will be a new creature you control that shares a name with the creature that was on the battlefield, so you won't draw a card. However, Guardian Project's ability may trigger for the new creature and you may draw a card as that ability resolves.
If the entering creature is put into your graveyard while Guardian Project's ability is on the stack, that same card will be a creature card in your graveyard that shares a name with the creature that was on the battlefield, so you won't draw a card.
