CardName: Golden Cogwheel
Cost: 3
Type: Artifact
Pow/Tgh: /
Rules Text: Whenever you cast an artifact spell, untap Golden Cogwheel.
{T}: Add {C} mana to your mana pool.
Flavour Text:
Set/Rarity: [Assorted] Card Repository Rare
Golden Cogwheel
R
Artifact
Whenever you cast an artifact spell, untap Golden Cogwheel.
: Add mana to your mana pool.
Source
reference for balance: Cloud Key, Mind Stone, Tangleroot
Published as mtgnexus Card of the Day 2020-09-24.