Selfless Samurai - Samurai Showcase (NEO) from Kamigawa: Neon Dynasty, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Ishikawa Kenta
• Card Text:
  Whenever a Samurai or Warrior you control attacks alone, it gains lifelink until end of turn.
  Sacrifice Selfless Samurai: Another target creature you control gets indestructible until end of turn.