Is Inner Fire legal in Standard, Modern, and Commander?

Inner Fire is legal in: Modern, Legacy, Vintage, Commander, Pauper.

What type of card is Inner Fire?

Inner Fire is a Sorcery. Its oracle text reads: "Add {R} for each card in your hand. *"Heart of Sokenzan, I call to you! Lend me your fire."*"

Sorcery

Add for each card in your hand.

*"Heart of Sokenzan, I call to you! Lend me your fire."*

Set Saviors of Kamigawa

Rarity Common

Mana Value 4

Artist Christopher Moeller

Collector # 105

Scryfall

Sorcery Modern Commander Pauper