Sami, Wildcat Captain

• WOTC Official Reminder Textofficial rules
  Vigilance — Attacking doesn't cause this creature to tap.
• WOTC Official Reminder Textofficial rules
  Double strike — This creature deals both first strike and regular combat damage.

• WWizards of the Coast2025-07-25
  Official Ruling
  To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
• WWizards of the Coast2025-07-25
  Official Ruling
  If a spell has multiple instances of affinity, each one applies. For example, if you somehow control two Sami, Wildcat Captains and you control two artifacts, each spell you cast will cost less to cast.
• WWizards of the Coast2025-07-25
  Official Ruling
  Affinity for artifacts means “This spell costs less to cast for each artifact you control.”

Rulings via Scryfall