When Armed with Proof enters the battlefield, investigate (To investigate, create a colorless Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.") twice.
Clues you control are Equipment in addition to their other types and have "Equipped creature gets +2/+0" and equip (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.).
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