Clues you control are Equipment in addition to their other types and have "Equipped creature gets +2/+0" and equip .
Legal in
Legacy, Vintage, Commander
Rulings (8)
Some abilities trigger "whenever you sacrifice a Clue". Those abilities trigger whenever you sacrifice a Clue for any reason, not just to activate a Clue's activated ability.
2024-02-02
Clue is an artifact type. Even though it appears on some cards with other permanent types, it's never a creature type, a land type, or anything but an artifact type.
2024-02-02
An Equipment without reconfigure that's also a creature can't be attached to anything. You can activate its equip ability, but it won't become attached. For example, if you control both Red Herring and Armed with Proof, Red Herring will be an Artifact Creature – Clue Equipment Fish with "Equipped creature gets +2/+0" and equip , but activating its equip ability won't result in it becoming attached to the target creature.
2024-02-02
If you control more than one Armed with Proof, creatures equipped with Clue Equipment will get +2/+0 for each Armed with Proof you control. The equip cost is still .
2024-02-02