Pearl-Ear, Imperial Advisor
Legendary Creature — Fox Advisor
Lifelink
Enchantment spells you cast have affinity for Auras. (They cost less to cast for each Aura you control.)
Whenever you cast an Aura spell that targets a modified permanent you control, draw a card. (Equipment, Auras you control, and counters are modifications.)
イラスト：
Modern Horizons 3#39レア英語適正
裁定
An Aura controlled by another player does not cause a creature you control to be modified.
A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.
A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.
If a spell has multiple instances of affinity, each one applies. For example, if you somehow control two Pearl-Ear, Imperial Advisors and you control two Auras, each enchantment spell you cast will cost 
less to cast.
If you put an Aura on an opponent's permanent, you still control the Aura, and it still counts for your spells that have affinity for Auras.
A creature you control that's the target of an Aura spell isn't modified unless it already has a counter on it, an Equipment attached to it, or an Aura you control attached to it.