mtg pay life cards Rules Text: Pay, 1, life, 264 Card that lets someone pay

We can derive it from this section of the CR: 601.2g If the total cost includes a mana payment, the player then has a chance to activate mana abilities (see rule 605, Mana Abilities)

Mold Folk comes with lifelink as well, allowing you to keep your life total up

A close second is White, with just three: Shahrazad (which creates a game-within-a-game situation), Limited Resources (which usually destroys lands and makes players unable to put new ones out), and Balance, the most cost efficient board wipe ever made

Being able to tell which kind of UW artifact deck you have brewing and leaning into cards which complement it is the most important skill for success with this archetype

Red comes from Mountains, Green comes from Forests, and Black comes from Swamps