Is Thunder Magic legal in Standard, Modern, and Commander?

Thunder Magic is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Thunder Magic?

Thunder Magic is an Instant. Its oracle text reads: "Tiered (Choose one additional cost.) • Thunder — {0} — Thunder Magic deals 2 damage to target creature. • Thundara — {3} — Thunder Magic deals 4 damage to target creature. • Thundaga — {5}{R} — Thunder Magic deals 8 damage to target creature."