Artifact
Imprint — T: you may exile target creature card in an opponent's graveyard. (The exiled card is imprinted on this artifact.)
Sacrifice ~this~: distribute the imprinted card's converted mana cost +1/+1 counters on all creatures
Imprint — 4WW, Sacrifice ~this~: exile target nontoken creature. (The exiled card is imprinted on this artifact.)
4W, T: put two tokens onto the battlefield that are a copy of the imprinted creature card

Converted mana cost: 2

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AlexChurchill/TypeFourArtifactGenerator