Tezzeret, Master of the Bridge
Legendary Planeswalker — Tezzeret
Creature and planeswalker spells you cast have affinity for artifacts. (They cost 
less to cast for each artifact you control.)
+2: Tezzeret deals X damage to each opponent, where X is the number of artifacts you control. You gain X life.
−3: Return target artifact card from your graveyard to your hand.
−8: Exile the top ten cards of your library. Put all artifact cards from among them onto the battlefield.
イラスト：
Secret Lair Drop#1701神話レア英語適正
裁定
Affinity for artifacts means “This spell costs less for each artifact you control.”
Tezzeret himself doesn’t have affinity for artifacts.
Affinity doesn’t change the spell’s converted mana cost. It changes only how much mana you pay to cast the spell.
Affinity can reduce only generic mana in a spell’s cost. It can’t reduce color requirements.
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.
If there are any additional costs or cost increases that would apply to a spell with affinity, apply those before applying any cost reductions.
If a spell has multiple instances of affinity, each applies.
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.