Manahive

Staff of Eden, Vault's Key are colorless artifacts. Here are similar cards:

Staff of Eden:

• Luxior, Giada's Gift – Equips to creatures/planeswalkers and grants abilities.
• Shadowspear – Grants lifelink/trample and allows ability interaction.

Vault's Key:

• Thousand-Year Elixir – Grants extra untap ability for creatures.
• Magewright's Stone – Untaps creatures with activated abilities.

Reason: All are colorless artifacts with activated/triggered abilities enhancing or untapping.