Rulings

• 2019-05-03
  Affinity for artifacts means “This spell costs less for each artifact you control.”
• 2019-05-03
  Tezzeret himself doesn’t have affinity for artifacts.
• 2019-05-03
  Affinity doesn’t change the spell’s converted mana cost. It changes only how much mana you pay to cast the spell.
• 2019-05-03
  Affinity can reduce only generic mana in a spell’s cost. It can’t reduce color requirements.
• 2019-05-03
  The cost reduction is set before you pay any of the spell’s costs. Specifically, you could lock in a discount for an artifact you control and then sacrifice that artifact to activate a mana ability.
• 2019-05-03
  If there are any additional costs or cost increases that would apply to a spell with affinity, apply those before applying any cost reductions.
• 2019-05-03
  If a spell has multiple instances of affinity, each applies.
• 2019-05-03
  In a Two-Headed Giant game, Tezzeret’s first loyalty ability causes the opposing team to lose twice X life and you gain X life.