What type of card is Treizeci, Sun of Serra?

Q: What type of card is Treizeci, Sun of Serra?

Treizeci, Sun of Serra is a Legendary Creature — Human Knight. Its oracle text reads: "Companion — Your starting deck contains only nostalgic cards. (Retro frames, legends, and artifacts are nostalgic.) Vigilance Whenever you cast a nostalgic spell, you may pay {2}. If you do, put a +1/+1 counter on Treizeci, then for each +1/+1 counter on it, create a Serra Angel token."

Treizeci, Sun of Serra

Legendary Creature — Human Knight

Companion — Your starting deck contains only nostalgic cards. (Retro frames, legends, and artifacts are nostalgic.)

Vigilance

Whenever you cast a nostalgic spell, you may pay . If you do, put a +1/+1 counter on Treizeci, then for each +1/+1 counter on it, create a Serra Angel token.