Sokka, Swordmaster

• WOTC Official Reminder Textofficial rules
  Vigilance — Attacking doesn't cause this creature to tap.

• WWizards of the Coast2025-10-02
  Official Ruling
  Sokka will count himself as an Ally for his second ability.
• WWizards of the Coast2025-10-02
  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 Coast2025-10-02
  Official Ruling
  Once you announce that you're casting a spell, no player may take actions until the spell has been paid for. Notably, opponents can't remove Sokka to change by how much Equipment spell costs are reduced.

Rulings via Scryfall