Rune

Rune is an aura enchantment type introduced in Kaldheim.

Description
Runes can enchant any permanent, though they only provide an effect if attached to a creature or equipment. When attached to a creature, they give it a specific ability. When attached to an equipment, they allow it to grant the same ability when equipped to a creature.

The Rune subtype doesn't have any special rules meaning, but there are a couple of cards that care mechanically about Runes.

Storyline
The Kaldheim runes are linked to blessings of the gods.

Rules
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Rune cards

 * Rune of Sustenance  Draw a card and give enchanted or equipped creature lifelink
 * Rune of Flight  Draw a card and give enchanted or equipped creature flying
 * Rune of Mortality  Draw a card and give enchanted or equipped creature deathtouch
 * Rune of Speed  Draw a card and give enchanted or equipped creature +1/+0 and haste
 * Rune of Might  Draw a card and give enchanted or equipped creature +1/+1 and trample

Cards interacting with Runes

 * Runed Crown  May put a rune card from library, graveyard or hand onto the battlefield attached to this equipment.
 * Runeforge Champion  May put a rune card from library or graveyard into hand. Replaces cost of rune spells with.