MTG Wiki
Keyword Ability
Type Static
Introduced Mirrodin
Last Used Modern Horizons 2
Reminder Text Affinity for [text] (This spell costs {1} less to cast for each [text] you control.)
Storm Scale 6[1]
22 Affinity for artifacts cards
{W} 4.5% {U} 50% {R} 9.1% {W/U} 4.5% {U/B} 4.5% {artifact symbol} 27.3%
1 Affinity for Plains card
{artifact symbol} 100%
1 Affinity for Islands card
{artifact symbol} 100%
1 Affinity for Swamps card
{artifact symbol} 100%
1 Affinity for Mountains card
{artifact symbol} 100%
1 Affinity for Forests card
{artifact symbol} 100%
1 Affinity for Tokens card
{U} 100%
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Affinity is a keyword ability that reduces the mana cost of a spell by the number of permanents of a certain type that player controls. It appeared in the Mirrodin block.


The ability is always written as "Affinity for [something]". The most common instance is "Affinity for artifacts" (see Frogmite). However, a cycle of Golems (consisting of Dross Golem, Oxidda Golem, Razor Golem, Spire Golem, and Tangle Golem) appeared in the Darksteel expansion, each with affinity for a particular basic land type.[2][3] Hum of the Radix functions as an "anti-affinity" enchantment, increasing by 1 the cost of all artifact spells for each artifact its controller owns. Mycosynth Golem grants affinity to artifacts for all artifact creature spells cast by its controller, in addition to having affinity for artifacts itself.

Almost all tournament-legal cards with affinity were printed during the Mirrodin block, and contributed heavily to the Second Combo Winter. The mechanic was considered for a return in the Scars of Mirrodin block, but rejected because it had been so destructive for the metagame in its first appearance.[4]

Affinity appeared as a one-off in War of the Spark with Tezzeret, Master of the Bridge.[5]

Affinity was reintroduced in Modern Horizons 2, using new variants such as "Affinity for tokens" (Junk Winder).

Unkeyworded affinity[]

With cost-reduction being so powerful and the format-warping effects of affinity for artifacts, the mechanic has not been revisited. However, single cards have been printed that fit the rules text but are not keyworded to save keyword learning space. Saheeli, the Gifted (Commander 2018), Gearseeker Serpent (Kaladesh), Emry, Lurker of the Loch (Throne of Eldraine) and Reality Heist are those that still use artifacts.

Other objects include:

Ten spells that care about Party have "Affinity for creatures in your Party", but the wording for Party and the wording of Affinity mix poorly. In a similar vein:

The next list does not require controlling the objects to discount, such as a certain quality of players, cards in other zones, or other player's creatures.


From the glossary of the Comprehensive Rules (June 10, 2022—Commander Legends: Battle for Baldur's Gate)

A keyword ability that reduces how much mana you need to spend to cast a spell. See rule 702.41, “Affinity.”

From the Comprehensive Rules (June 10, 2022—Commander Legends: Battle for Baldur's Gate)

  • 702.41. Affinity
    • 702.41a Affinity is a static ability that functions while the spell with affinity is on the stack. “Affinity for [text]” means “This spell costs you {1} less to cast for each [text] you control.”
    • 702.41b If a spell has multiple instances of affinity, each of them applies.


  • The affinity ability reduces only the amount of generic mana you pay. It can't reduce how much nongeneric mana you pay.
  • Affinity can't reduce the cost to cast a spell to less than {0}.
  • Affinity doesn't change the spell's mana cost or converted mana cost. It just changes how much mana you pay to cast the spell.
  • The cost reduction is set before you have to pay any costs for the spell. If you sacrifice an artifact while paying the spell's costs, that artifact still counts toward the cost reduction.



Into Thin Air {5}{U}
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Return target artifact to its owner's hand.

Notable cards with affinity[]

Frogmite, Myr Enforcer, Thoughtcast - used in affinity decks


  1. Mark Rosewater (October 13, 2013). "So I know you tried to bring it back in...". Blogatog. Tumblr.
  2. Mark Rosewater (January 19, 2004). "To Affinity And Beyond". Wizards of the Coast.
  3. Aaron Forsythe (July 30, 2004). "The Power Behind Affinity". Wizards of the Coast.
  4. Mark Rosewater, Drive to Work #263 "2010"
  5. Mark Rosewater (March 31, 2019). "AFFINITY FOR ARTIFACTS IN STANDARD?!". Blogatog. Tumblr.