Power and Domains
Power comes in six colours called Domains, and runes come in the same six. Recycle a Fury rune and you get Fury Power. Recycle a Mind rune and you get Mind Power.
A card's Power cost names the Domain it needs. Gemcraft Seer costs 3 Energy and Mind Power, so you need a Mind rune to recycle. A Fury rune will not do. Energy has no colour, so any rune can pay that part.
- Gemcraft Seer: 3 Energy and 1 Mind Power. Only a Mind rune can pay the Mind.
- Daughter of the Void, a Legend: it adds a rainbow [C] you can spend on spells.
- Carnivorous Snapvine: 5 Energy and two Body Power. Two Power means two different Body runes; one rune only makes 1 Power.
- A rainbow [C] in a cost means Power of any Domain. Any rune can pay it.
- A rainbow [C] that a card adds, like your Legend in Kai'Sa's deck, is wild Power. It pays any Domain, and you never pick one.
- Cards with no Power cost, like Flame Chompers, can be paid with any runes at all.
So before you recycle, check the Domain. Recycling the wrong colour loses a rune and still leaves the cost unpaid.
Gemcraft Seer needs Mind Power. You have a Fury rune and a Mind rune. Which do you recycle for the Mind Power?
Carnivorous Snapvine needs two Body Power. You have one Body rune and two Fury runes. Can you pay the Power?
A card adds a rainbow [C]. What do you do with it?
Rocket costs 4 Energy and a rainbow [C]. Ray needs Fury. You have one Fury rune and four Chaos runes. Which rune should pay Rocket's rainbow Power?
Make your guess, then play the drill to find out.
Hextech Ray has a keyword, [Action]. Ignore it for now: a later lesson explains it.
Words from this lesson
- Rainbow [C]
- Power of any Domain. In a cost any rune pays it; when a card adds it, it pays any Domain cost.
From the Core Rules (2026-10-09): 164 — Basic Runes (Power of the recycled rune's Domain) · Power and Domains: rainbow · Owner ruling 2026-10-14: added [C] pays any Power cost